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My solo backpack sprayer is hard to pump - Solo Backpack Sprayer

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Posted on Jan 02, 2017

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SOURCE: Stanley 61804N Professional Backpack Poly

Doc,
Yes, please replace the seal.

Posted on Mar 05, 2011

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SOURCE: I have two 428 solo back pack sprayers both of the

i have 428 with a broken pump handle. the solo co. has some parts.their ph. no. is 757-245-4228,i talked to a young man @ ext.352,name is shawnatin.if you can't get the parts,i would like to offer you $5.00 a peice for the handles & shipping cost.just snapped today while working in my yard.

Posted on Aug 15, 2012

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1 Answer

I put a new diaphram in the pump and now the pump handle doesn't pump on the proper time of the stroke. It is like it is pumping on the backstroke.How do I get the proper timing back


Hi Donald
Not knowing the details of your pump I can only start by asking one question....
Is it possible to install the new diaphragm upside down?
Reply as a comment to this post to let me know what you find.
Cheers

Feb 26, 2016 | Solo 475 - 4Gal Backpack Sprayer

1 Answer

My solo backpack sprayer won't pump up when I use the handle. What's wrong and how to repair it?


chabunga offered really good info...except for the suggestion to use Vaseline on the 'O' ring. NEVER use Vaseline on anything rubber, because it is a petroleum based product and it will cause the ring to deteriorate. Use a non-petroleum based lubricant instead.

Jun 03, 2012 | Solo Backpack Sprayer

1 Answer

Trying to remove pressure tank from inside spray unit. trying to replace all seals.


dont !!!!! just buy a new one bout 100 bucks but if u want it comes out thru top but u have to take lose underneath
way too labor intensive for the price of new one

Dec 31, 2010 | Solo 475 Backpack Sprayer Back Pack...

1 Answer

I have a 3 gal. back sprayer. When you try to presureize the tank to spray, The pump seems to work but there is no pressure. If repairs are necessary, where in the Redding, Ca. area is a repair shop for...


Hi there
There are many possible reasons for your sprayer not pressurizing. If the pump lever is moving freely and does not seem to be building pressure while pumping it is possible that the O-ring at the valve is damaged, the seal in the pressure regulator is leaking, the piston or the collar is worn. Any of these problems will require disassembly of the unit and inspection of each part. If you do feel resistance building as you pump but quickly loose pressure you likely have leaks in the diaphram, it's seal, the pressure cylinder or the tank itself.
If you are comfortable disassembling the unit and inspecting the parts for wear or damage most of the individual replacement parts are fairly easy to replace and readily available online from Solo or at many retail outlets and supply companies. Solo has done a great job with how-to videos and instructions for each procedure on their web site www.solousa.com
If you are not comfortable disassembling and repairing your sprayer yourself you can try contacting a mower/equipment repair shop in the Redding area as is seems the nearest Authorized Solo sprayer repair center is Cloverdale Saw in Cloverdale CA, 707-894-2273

Dec 31, 2010 | Solo Backpack Sprayer 3 Gallon Capacity,...

1 Answer

Leaking contents at bottom of tank.


Buy yourself a tube of "Seal-All" or JB Weld expoxy at Auto Zone. They will stop your leak.

Aug 17, 2010 | Solo Backpack Sprayer

1 Answer

I have a Stanly backpack sprayer pro 61804n and need a repair manual. Were could I find one. Thank You, Chuck


The picture looks a lot like a Solo sprayer I have. I wouldn't be surprised if Solo made them for Stanley. Do a search for Solo sprayers. They have a site. My sprayer is a Solo 425

Jun 21, 2010 | Stanley Professional Backpack Poly...

1 Answer

I have two 428 solo back pack sprayers both of the pumps have crackes in them where do I get parts. Help!!!


i have 428 with a broken pump handle. the solo co. has some parts.their ph. no. is 757-245-4228,i talked to a young man @ ext.352,name is shawnatin.if you can't get the parts,i would like to offer you $5.00 a peice for the handles & shipping cost.just snapped today while working in my yard.

May 02, 2009 | Solo Backpack Sprayer 5 Gallon, Model# 428

3 Answers

Solo 425 and 475 spray packs.


I have a 425 that I have had to remove the pressure cylinder. I found this on the internet one time, but can't find it again. Anyhow, this is how to remove the pressure cylinder on a Solo 425. Do all the disassembly instructions in the owners manual. Then get a short 2x4 or 2x2 and place it on top on the pressure cylinder through the opening on top of the tank. Then give it a good whack with a hammer. Don't be shy, that ****** is in there. It may take more than one whack. Once you have the cylinder out there is a screen on the cylinder that must be cleaned. To re-assemble, turn the sprayer upside down, insert the pressure cylinder, lay the 2x4 across the bottom of the cylinder and use even force (and hammer) to force the cylinder back in. Stop when you get to the O ring seat and you can do the rest by hand, being careful not to pinch the O ring. I have had Solo sprayers for many years and think they are great. But when it seems that when I leave glyphosate (Roundup) in the sprayer it clogs the screen. My hard water may contribute to the problem.

Mar 27, 2009 | Solo Backpack Sprayer

2 Answers

Sprayer wont spray or hold pressure


We use the both the 425 and 475 solo sprayers most days at work and when they start to lose pressure ( after 6 months of daily professional use) we purchase a complete seal kit and put it through them. The only part I can't work out how to remove is the inside cylinder, other than that everything else is easily removed and replaced.

Jan 14, 2009 | Solo Backpack Sprayer

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