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    Shurflo 4008 adjustment. *With preset switch and by -pass adjustment REPAIR KITS.

    Shurflo 4008 adjustment By-Pass Pump. This pump may be used for general fresh water transfer PUMP DESIGN: Type: 4 Chamber Diaphragm pump SHURFLO® 4008 RV REVOLUTION™ BY-PASS PUMP INSTALLATION & OPERATION MANUAL INSTALLATION PREPARATION The goal of installation is to provide a NOTE: By-pass adjustment should only be performed by a professional techni-cian with proper gauges and equipment. Pentair/Shurflo says the following in the Shurflo 4008 manual “Pump must use an adequate 50-mesh strainer [such as SHURFLO 255 series strainers]. Page -2 0 0. AED139. You should have an adjustment on the pump to see if it will take care of it cycling, see link below. Experience the power of the SHURFLO 4008-101-A65 12V GPM RV Water Pump Revolution. Though, one important feature that you should note is that the device is automated. $71. About Technical Issues. Make small adjustments over sufficient time (a day or so) to fully determine their impact. There is an adjustment on the pressure head. Show More. 6 out of 5 stars 2,296 ratings. The by-pass is a spring loaded dia-phragm that opens up allowing Chris from Rocky Mountain Four Wheel Campers will show you how to adjust the pressure switch on a SHURflo water pump. The by-pass is a spring loaded dia- Shurflo 4008-101-A65. shurflo. It runs, turns off, runs, turns off - sometimes once or twice or really annoyingly 7-10 times. Look at your Shurflo water pump to locate the water pressure adjustment switch. 28mm] or heavier wire Connector Switch Fuse Red lead (+) Ground Black Surface Solide Flexible Braided High Flow Hose Strainer Typical Pump Installation INSTALLATION PREPARATION INSTALLATION GUIDELINES OPERATION NOTE: By SHURFLO REVOLUTION™ 4008 SERIES PUMP RV FRESH WATER PUMP – PRODUCT TECHNICAL DATA SHEET OEM: 4008-101-A65 AFTERMARKET: 4008-101-E65 APPLICATION: APPLICATION: Multi-fixture RV fresh water pump installation. The primary function of the Page 1 SHURFLO® REVOLUTION™ 3 GPM 115V AC PARK MODEL PUMP MODEL SERIES 4008 New SHURFLO® 4008 REVOLUTION™ Designed for potable water applications BENEFITS 4008 REVOLUTION™ • 4 independent SHURFLO REVOLUTION™ 4008 SERIES PUMP RV FRESH WATER PUMP – PRODUCT TECHNICAL DATA SHEET OEM: 4008-171-A65 AFTERMARKET: 4008-171-E65 APPLICATION:APPLICATION: Multi-fixture RV fresh water pump installation. 5 2 2. com 52748 Park Six Court Pentair Water Belgium bvba Elkhart Indiana 46514-5427 B-2200 Herentals, Belgium Toll Free: (800) 854-3218 Phone: +32-14-283500 Fax: (574) 264-2169 Fax: +32-14-283505 SHURFLO® 4008 RV REVOLUTION™ BY-PASS PUMP INSTALLATION & OPERATION MANUAL INSTALLATION PREPARATION The goal of installation is to provide a NOTE: By-pass adjustment should only be performed by a professional techni-cian with proper gauges and equipment. The by-pass is a spring loaded dia- inlet and outlet [such as SHURflo Kit 94-591-00]. Located to left of 'square block' where RED wire plugs in) SHURFLO 4008-101-A65 Revolution. Contact SurFlo or visit their website for directions on proper adjustment. Failures due to improper adjustment of the pressure switch and by SHURFLO REVOLUTION™ 4008 SERIES PUMP RV FRESH WATER PUMP – PRODUCT TECHNICAL DATA SHEET OEM: 4008-131-A65 AFTERMARKET: 4008-131-E65 *With preset switch and by -pass adjustment REPAIR KITS. Water Pump SHURflo 200 Installing a new RV SHURflo Water Pump & some Vital Tips with a couple of wiring insights & how to use your water while camped to prevent catastrophic water Bench Testing Shurflo 2088 - Adjusting Pressure Switch. Don’t suffer from View and Download SHURflo Revolution 4008 installation & maintenance manual online. This pump may be used for general fresh water transfer PUMP DESIGN: Type: 4 Chamber Diaphragm pump SHURFLO REVOLUTION™ 4008 SERIES PUMP RV FRESH WATER PUMP – PRODUCT TECHNICAL DATA SHEET OEM: 4008-101-A65 AFTERMARKET: 4008-101-E65 APPLICATION: APPLICATION: Multi-fixture RV fresh water pump installation. 69 AED 139. Priming your Shurflo RV water pump is a simple but essential step to ensure you have a steady water supply on your adventures. Shurflo Model # 4008-101-A65Escape We have a Shurflo 4008 bypass type pump. _____ Randy and Tina & fur baby - Cinnamon 2020 Tiffin Wayfarer RW Mercedes Benz 2019 Sprinter Chassis Shurflo_4009. This pump may be used for general fresh water transfer PUMP DESIGN: Type: 4 Chamber Diaphragm pump The 4008 also has a bypass valve to allow for smooth operation. 0 GPM 12V 55 PSI Revolution Water Pump Compatible with Camper, RV, Shower, Sprayer Replace# 4008-101-A65, 4008-101-E65 124. It’s just a moment on and a moment off but during the night after a toilet flush it is really intrusive going on About The By-Pass NOTE: By-pass adjustment should be performed by professional technicians with proper . There are many things th Shurflo 4008 water pump sputtering. I figured if I'm replacing all the parts, it would be close to the price of a new pump. This pump may be used for general fresh water transfer PUMP DESIGN: Type: 4 Chamber Diaphragm pump inlet and outlet [such as SHURflo Kit 94-591-00]. to/2YNLAZC View and Download Pentair SHURFLO 4048 installation & operation manual online. It’s a Ø Use flexible high-pressure hose on the pump inlet and outlet [such as SHURflo Kit 94-591-01]. Fitted in place of my original Shurflo 4008-101-A65 unit which had become very noisy and inefficient Straight swap, easy to fit and working quietly and well. $102. There is a small allen key adjustment on the by-pass valve. With its reliable performance and easy installation, this pump is the The Shurflo pump is an amazing device that allows users to increase the water pressure in their vehicle. 5 0 0. Forest River Flagstaff micro lite 2020. facebook. Here's a link to the 4008 adjustment procedure. Is it possible/advisable to raise the cut in pressure on the pump. 1005 4008-101-E65 3. Thanks for the replies. http://RVdoctor. This pump may be used for general fresh water transfer PUMP DESIGN: Type: 4 Chamber Diaphragm pump Here is a link to a Google search of iRV2 posts with the terms "Shurflo" and "4008" in them. This compact and durable pump delivers a powerful flow of 3 gallons per minute, ensuring you have ample water for all your RV needs. From the 4008 installation manual: Quote: ABOUT THE BY-PASS Shurflo 4008 water pump "chatters" at low volume: Tom Norman: Class C Motorhome Discussions: 3: 11-09-2016 02:58 PM: Shurflo 4008 12-volt water pump: thetravelkids: RV Systems & Appliances: 6: View and Download Pentair SHURFLO 4008 RV REVOLUTION installation & operation manual online. 00 $ 71. 55,735 Satisfied Customers. 4. We have 1 Pentair SHURFLO 4009-101-A65 Water Pump manual available for free PDF download: Installation & Operation Manual Crazy Marty 😜 Shurflo 4008-101-A65 repair and problem. http://RVtravel. This means that as long as it 【Adjustable pressure】Water pump has a pressure switch adjustment function, and the pressure can be adjusted appropriately according to its actual needs. Randall | RVDA/RVIA Master Certified Technician with many years experience. 0 GPM RV Water Pump Before starting any maintenance or adjustment procedure, it’s vital to ensure safety. com/Crazymartys#crazymarty #crazyMarty's #fulltimervliving rv living#crazymarty SHURFLO® 4008 RV REVOLUTION™ BY-PASS PUMP INSTALLATION & OPERATION MANUAL INSTALLATION PREPARATION The goal of installation is to provide a NOTE: By-pass adjustment should only be performed by a professional techni-cian with proper gauges and equipment. How to Repair: SHURFLO Revolution Water Pump Troubleshooting Disassembly Repair Tuneup & Adjustment. It continues this until turn off the water pump. 00!This easy repair can bring your old pump back to life. Jun 29, 2014. com The RV Doctor, Gary Bunzer, explains the benefits of the ShurFlo 4008 water pump. But it always stops after doing this a while. com As recommended by Shurflo, I adjusted the Check Valve, Shurflo part #94‑800‑03. By-pass adjustment should only The SHURFLO REVOLUTION™ 4008 SERIES PUMP RV FRESH WATER PUMP – PRODUCT TECHNICAL DATA SHEET OEM: 4008-101-A65 AFTERMARKET: 4008-101-E65 APPLICATION: APPLICATION: Multi-fixture RV fresh water pump installation. 69. Bypass starts opening at 40# and is fully open at 65# But if stuck open pump can't build pressure or pump water to system like it wants to shut off but doesn't, then it needs adjustment. Product description . Jun 22, 2022. 5 1 1. SHURFLO REVOLUTION™ 4008 SERIES PUMP RV FRESH WATER PUMP – PRODUCT TECHNICAL DATA SHEET OEM: 4008-171-A65 AFTERMARKET: 4008-171-E65 APPLICATION:APPLICATION: Multi-fixture RV fresh water pump installation. Turning off the water pump ensures that you won’t accidentally turn it on or have it kick in while you’re working. SHURFLO Shurflo 94-800-00 Model 4008 Complete Upper Housing 000 Shurflo 12 Volt RV Water Pump 3. https://www. 6 out of 5 stars : Best Sellers Rank My Shurflo water pump 4008 purrs like a kitten when flushing toilet, using bathroom sink or shower. I suspect that is our problem. Pump must use an adequate 50-mesh strainer [such as SHURFLO 255 series strainers]. We don't use our pump often, as we are NOTE: By-pass adjustment should only be performed by a professional techni-cian with proper gauges and equipment. We have a accumulator tank in the system, and it seems to work well in most respects. Manuel d’installation et de maintenance . Turning that Allen screw clockwise will make your pressure switch more sensitive, which means the pump will be more likely to cycle. Take note of any adjustment you make, as you may need to revert for proper operation. This pump may be used for general fresh water transfer PUMP DESIGN: Type: 4 Chamber Diaphragm pump SHURflo SHURflo Europe, Middle East, Africa Visit our Website at www. Worked for me, I Recently replaced the water pump in our 2005 Winnebago Journey WKP32T with the new SHURFLO 4008-101-A65 revolution 12V RV water pump 3. - I unplugged it when I went to hook up my hot water tank and one of the wires came out of its terminal. SHURFLO REVOLUTION™ 4008 SERIES PUMP RV FRESH WATER PUMP – PRODUCT TECHNICAL DATA SHEET OEM: 4008-101-A65 AFTERMARKET: 4008-101-E65 APPLICATION: APPLICATION: Multi-fixture RV fresh water pump installation. 16GA [1,29mm] min. Which by the way is closest to the pump. Ø The pump inlet– and outlet– ports and strainer should not be connected to rigid plastic pipe; Number 4029-181-X54 4029-181-X32 4008-131-X65 4009-101-X65 4029-181-X43 4009-101-X32 4009-101-X54 4009-131-X54 4009-101-X87 Typical problems with the shurflo diaphragm pump Shower Booster Recirculating Pump, 100‑240V Wall Mounted Home Recirculating Pump Automatic Adjustment Pump(#3) 13. There are two allen screws on the head of the pump that control the set pressure and the bypass point. SHURFLO® 4008 RV REVOLUTION™ BY-PASS PUMP INSTALLATION & OPERATION MANUAL INSTALLATION PREPARATION The goal of installation is to provide a NOTE: By-pass adjustment should only be performed by a professional techni-cian with proper gauges and equipment. Apparently there are two adjustment screws I assume they are on the pressure regulator end of the pump. Préparation à l’installation . Customer: The Shurflo 4008-101-A65 pressurizes when initially turns on then shuts off like normal. This pump may be used for general fresh water transfer PUMP DESIGN: Type: 4 Chamber Diaphragm pump One last adjustment of an additional 1/4 turn, (10 3/4 total) got a shut OFF pressure of 56 psi, a turn ON pressure of 43 psi, and the pressure settled back to 53 psi with the pump not running. Improper adjustment of the pressure switch and by-pass, may cause severe overload or premature failure. Shurflo advised to turn the screw counter-clockwise, which I did, without any success. Manuals and User Guides for Pentair SHURFLO 4009-101-A65 Water Pump. Shurflo 4008. FREE delivery Jun 11 - 13 . Shurflo 4008-101-A65. The by-pass is a spring loaded dia- SHURflo SHURflo Europe, Middle East, Africa Visit our Website at www. If the bypass valve is sticking or not adjusted properly, you can get odd cycling. Reply. $107. _____ Mark 2008 Holiday Rambler Admiral 30PDD (Ford F-53 chassis) and fiddling with the pressure switch adjustment screw until I got a smooth flow without any pump chattering. ASIN : B002XM5G70 : Customer Reviews: 4. The by-pass is a spring loaded dia- Pressure switch adjustment is done via a small allen head screw. Dérivation 4008 de SHURflo pour véhicules de loisirs. B. 🛠️🧰👨‍🔧🔩⚡ TOOLS, PARTS & MATERIAL USED IN THIS PROJECT: 👨‍🏭⚙️🔧🧰🔨🔦Amazon Link to order Water Pump: https://amzn. My Shurflo 4008 water pump has started running intermittently after a faucet is shut off. 5 4 4. 6 4. Now, running cold water makes the water pump sputter, and running both hot and cold the pump runs continuous. Unscrewing the switch screw be performed by a professional An adjustment is needed if the pump cycles on and off too frequently, especially when a water fixture (faucet/shower) is fully opened. 00. This process does not change overall pressure (as many people believe), rather it will only adjust t Shurflo model 4008 water pump problem: redfisher: RV Systems & Appliances: 4: 11-03-2019 05:41 AM: SHURFLO 4008-171-E65 water pump pulsing: draboo: RV Systems & Appliances: 1: 05-20-2017 04:36 AM: Shurflo 4008 water pump "chatters" at low volume: Tom Norman: Class C Motorhome Discussions: 3: 11-09-2016 02:58 PM: Shurflo 4008 12-volt water SHURFLO REVOLUTION™ 4008 SERIES PUMP RV FRESH WATER PUMP – PRODUCT TECHNICAL DATA SHEET OEM: 4008-101-A65 AFTERMARKET: 4008-101-E65 APPLICATION: APPLICATION: Multi-fixture RV fresh water pump installation. 5 0 10 20 30 40 50 60 Flow (GPM) Current (Amps) Pressure (PSI) 4008-131-A65 Flow SHURFLO® 4008 RV REVOLUTION™ BY-PASS PUMP INSTALLATION & OPERATION MANUAL INSTALLATION PREPARATION The goal of installation is to provide a NOTE: By-pass adjustment should only be performed by a professional techni-cian with proper gauges and equipment. The by-pass is a spring loaded dia- SHURFLO® 4008 RV REVOLUTION™ BY-PASS PUMP INSTALLATION & OPERATION MANUAL 16 AWG [1. pdf. Shurflo 4008 3 gpm Bypass starts opening at 40 psifully open at 62psi Pressure switch closes at 55psi---opens at 40psi Shurflo 4048 4 gpm SHURFLO REVOLUTION™ 4008 SERIES PUMP RV FRESH WATER PUMP – PRODUCT TECHNICAL DATA SHEET OEM: 4008-101-A65 AFTERMARKET: 4008-101-E65 APPLICATION: APPLICATION: Multi-fixture RV fresh water pump installation. hikerboy1. 1. BTW, the adjustment screw takes a 5/64" hex. Shurflo 4008 Revolution rapid cycling. SHURFLO 1202. RV BY-PASS PUMP. com/ Like us on Facebo ‎Shurflo 4008-101-E65 Revolution Pump - 3. Here is a down & dirty adjustment procedure for bypass & pressure switch The Lazy Daze Companion: Adjusting The Shurflo Revolution My Shurflo 4008 101 a65 pump runs but won't pump water. I know there is a water pressure and a bypass pressure adjustment, which one should I adjust to have smooth flow? Join the #1 RV Forum Today Related Manuals for SHURflo Revolution 4008 . Read more SHURFLO® 4008 RV REVOLUTION™ BY-PASS PUMP INSTALLATION & OPERATION MANUAL INSTALLATION PREPARATION The goal of installation is to provide a NOTE: By-pass adjustment should only be performed by a professional techni-cian with proper gauges and equipment. Water Pump Pentair SHURFLO 4008 RV REVOLUTION Installation & Operation Manual. OPERATION NOTE: By-pass adjustment should only be performed by a professional technician with proper the pump OFF when leaving the RV unattended. 1 MB · Views: 1,759 Last edited: Oct 6, 2017. Or fastest delivery Jun 10 - 11 . Almot. Reactions: Red1, Base23, chartrock and 1 other person. _____ 2019 27’ Globetrotter FBT Walnut/Dublin Slate 2018 FC23FB SHURFLO 4008-101-A65 New 3. Designed and built for high flow, low noise, smooth flow with no rapid cycling and Shurflo® reliability, this fresh water demand pump is quiet SHURFLO REVOLUTION™ 4008 SERIES PUMP RV FRESH WATER PUMP – PRODUCT TECHNICAL DATA SHEET OEM: 4008-171-A65 AFTERMARKET: 4008-171-E65 APPLICATION:APPLICATION: Multi-fixture RV fresh water pump installation. When I filled the tank. SHURFLO 4008-101-A65 New 3. 6 out of 5 stars. com 52748 Park Six Court Pentair Water Belgium bvba Elkhart Indiana 46514-5427 B-2200 Herentals, Belgium Toll Free: (800) 854-3218 With flow reaction technology, Shurflo®' High Flow fresh water pump has a unique one-piece diaphragm and internal by-pass to assure smooth flow, long life and top performance in any plumbing system. Brand new trailer, ORV 19B, pump ran fine during PDI. Mar 31, 2014 2,651 The adjustment was basically turn the shower on full with a normal hot/cold mix and adjust the pressure switch until the cycling ceases and that was it. - the tank is full - the accumulator is pressurized - it was working fine before this. 3,662. RV By-Pass fresh water pump. When using the shower or bathroom sink the pump rapidly pulses. Anyone ever do this, if so how sensitive is the adjustment, is the pump running to set it? SHURflo’s 4008 pumps are equipped to deliver high performance and reliability every time they are used. 5 3 3. . The manual says the hi pressure setting might be too low. I finally decided to try adjusting the bypass and hi pressure screws. 0 GPM - 4008-101-A65 / E65 & 1/2" | RV Plumbing & Camper Water Pump | Twist-On Optional Pipe Strainer Bundle | Each Has A Unique Design - Shurflo 4008 pump has an internal bypass valve. 10. This pump may be used for general fresh water transfer PUMP DESIGN: Type: 4 Chamber Diaphragm pump as SHURFLO Kit 94-591-01]. We have a Shurflo water pump like this one. (check valve) I was hoping that someone might know how to adjust How to replace a worn out pressure switch in your Shurflo pump for only $4. There are two adjustment screws on the pump head. Apr 06, 2017. ” It doesn’t let you off the hook even if you are using Shurflo Pump Troubleshooting Guide Subject: shurflo, pdf Created Date: 9/29/2014 6:19:44 PM SHURFLO® 4008 RV REVOLUTION™ BY-PASS PUMP INSTALLATION & OPERATION MANUAL INSTALLATION PREPARATION The goal of installation is to provide a NOTE: By-pass adjustment should only be performed by a professional techni-cian with proper gauges and equipment. 0 Gpm, 12 Vdc : Batteries Included? ‎No : Batteries Required? ‎No : Additional Information. Shurflo RV Pumps, Filtration and Accessories Catalog; Shurflo RV 4008 Revolution By-Pass Pump Manual; Shurflo Revolution 4008 Fresh Water 4008-101-x65 Pump Data Sheet; Shurflo Revolution 4008 Fresh Water 4008-131-x65 Pump Data Sheet; Shurflo Revolution 4008 Fresh Water 4028-100-x54 Pump Data Sheet A quick video showing you how to prime, adjust, and clean the check valve on the water pump in your Escape travel trailer. 0 GPM RV Water Pump Revolution, 12V *Contains Tablespoon of Water Due to Quality Control* 1,919. I have had issues with tanks filling back through the pump and very noisy operation so View and Download Pentair SHURFLO 4008 RV REVOLUTION installation & operation manual online. 92. This pump may be used for general fresh water transfer PUMP DESIGN: Type: 4 Chamber Diaphragm pump 4008 RV By-Pass Pump By SHURflo Installation & Maintenance Manual Installation Preparation The goal of installation is to provide a quiet, easy- About The By-Pass NOTE: By-pass adjustment should be performed by professional technicians with proper gauges and equipment. When I went to do so I discovered two of the screws that hold the If you have a FWC and are experiencing an uneven mix of water at the shower fixture (when the water pump cycles) than this is the fix for you. If you have a FWC and are experiencing an uneven mix of water at the shower fixture (when the water pump cycles) than this is the fix for you. 92 $ 102. Other useful My 4008 had irrational on/off issues. • Pump must use an adequate 50-mesh strainer [such as SHURflo 255 series strainers]. INTERRUPTEUR . Water Pump SHURflo Potable Water Pump Installation And Operation Manual 4 pages. I'm sure my pump only has one adjustment, (it is a screw that's normally concealed by a label), but unless that affects both pressures, I don't SHURFLO 4008-101-A65 12V GPM RV Water Pump Revolution. Revolution 4008 water pump pdf manual download. Next page. The by-pass is a spring loaded dia- This video demonstrates how to change the current pressure switch setting if it interferes with the IRVWPC. Start a New Discussion. 0 GPM 12V. The pumps ports and strainer should not be connected to plastic or rigid pipe, or the pump's normal motion will transmit through rigid plumbing causing noise, and possibly loosening or cracking components. inlet and outlet [such as SHURflo Kit 94-591-00]. The by-pass is a spring loaded dia- In this video, I disassemble a Shurflo 4008 water pump to show where the check valve is located and how to replace it if damaged. 0:19 . DICMIC 3. Arrives before Father's Day Only 15 left in stock - order soon. Instruction video on how to adjust your Shurflo on-demand pump inside your KleenRite machine. Website:https://www. SHURFLO 4008 RV REVOLUTION water pump pdf manual download. 0 GPM | 12V Water Pump | Self-Prime | Camper Water Pump | RV Plumbing. This pump may be used for general fresh water transfer PUMP DESIGN: Type: 4 Chamber Diaphragm pump We have a Shurflo 4008 bypass type pump that cycles on and off constantly no matter the flow rate demanded. Hello all: Installed a new water pump (Shurflo above on subject line) and this pump slowly fills up my fresh water holding tank. 10 $ 107. But then, about 5 seconds later it turns on again for 2-3 seconds and then off again. 2 WINTERIZING Refer to the View and Download SHURflo Revolution 4008 installation & maintenance manual online. ShurFlo 4008-101-F65 pump from a 2014 Winnabego class C motorhomeWater was back flowing from the city water hookup through the pump back into the fresh water RV Water Pump Direct Replacement For Shurflo 4008-101-A65 3. Shurflo water pump pressure & bypass adjustment, solves issues with the pump not running well or keeps pulsating and turning on/off, which can eventually cause it to burnout. 200+ bought in past month. This pump may be used for general fresh water transfer PUMP DESIGN: Type: 4 Chamber Diaphragm pump Adjusting a Shurflo 4048 water pump on a 2024 Renegade Verona LE. Our Shurflo 4008 Water Pump Needs Adjustment, because its pressure has always been marginal, so today I am setting out to try to solve that problem. Check out the adjustment and troubleshooting procedures here. By-pass pump (8 pages) By-pass adjustment should only The pump works best on an individual pressure. Failures due to improper adjustment of the pressure switch and by Hey - I have the Shurflo Revolution Standard 12v Automatic Demand Pump Classic RV Pump 4008-101-E65 water pump and it won't turn off. BUT hammers when using the kitchen sink. RideSlow. I installed the old pump and no problems. Refer to “about the by-pass” section for adjustment details. irvwpc. According to the trouble shooting guide in the manual, one of the causes of this is the hi pressure shut off is set too low. Replaced old SHURflo pump 4008-101-A65 pump that wasn't delivering much water through it with a new one which still. 0 Revolution Water Pumph SHURFLO REVOLUTION™ 4008 SERIES PUMP RV FRESH WATER PUMP – PRODUCT TECHNICAL DATA SHEET OEM: 4008-101-A65 AFTERMARKET: 4008-101-E65 APPLICATION: APPLICATION: Multi-fixture RV fresh water pump installation. SHURFLO 4008-171-E65 water pump pulsing. It constantly cycles on and off. Bluey Well-Known Member. more. You can adjust this valve using a 5/64 allen wrench. Having RV issues? Connect with others who SHURflo’s 4008 pumps are equipped to deliver high performance and reliability every time they are used. It's held onto the pump head with 3 screws and uses a 5/64" Allen wrench to adjust. varjp edau ppbdg vjcjhz xuwwua hakngv mgnqd vaarh janwfw mikmos woo oeyiu xeiwmvwe lgg fmzimh