Pressure Washer Pump Oil and Protectors
Pump Oil, Pump Guard and O Ring Kits for Pressure Washers
Most pressure washer pumps die from three things: old oil, water left inside to freeze, and a torn o ring that lets air in. The three Simpson parts here address all three. The 80138 pump crankcase oil is the change a triplex pump needs every 50 hours or every season. The 80273 pump guard is the antifreeze and lubricant you pump through the machine before winter or a month in the truck. The 80151 o ring and filter kit replaces the seals at the hose and gun connections and the inlet filter that keeps grit out of the pump. All ship new from the manufacturer through High Pressure Car Washer, an authorized Simpson dealer, with free shipping to the lower 48 states.
These fit Simpson machines and most triplex and axial pumps with standard quick connects. If you run a Pressure-Pro, BE, Cam Spray or Kranzle unit, the product page on your machine lists its oil and seal kit, and a call confirms it. The guide under the products covers the oil change, winter storage and the leaks an o ring kit fixes.
Start here: our pick for each job
Compare the pressure washer pump oil and protectors buyers ask about most
| Model | Product | Use | Best for |
|---|---|---|---|
| Simpson 80138 | Pump crankcase oil | Every 50 hours or each season | Triplex pumps, Simpson and most brands |
| Simpson 80273 | Pump guard | Before storage or freezing weather | Any pressure washer |
| Simpson 80151 | O ring and filter kit | Leaks, surging, pressure loss | Standard quick connect machines |
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Simpson 80273 Pressure Washer Pump Guard
Original price $12.99 - Original price $12.99Original price$12.99$12.99 - $12.99Current price $12.99The Simpson 80273 Pump Guard is the storage protector for a pressure washer pump: pumped in before the machine sits for the season, it coats the pi...
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Simpson 80151 Replacement O-Ring and Filter Kit
Original price $6.99 - Original price $6.99Original price$6.99$6.99 - $6.99Current price $6.99The Simpson 80151 is the kit of o-rings and screen filters that keeps a pressure washer sealing and flowing: a leaking coupler, a weeping gun or a ...
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Simpson 80138 Pump Crankcase Oil
Original price $10.99 - Original price $10.99Original price$10.99$10.99 - $10.99Current price $10.99The Simpson 80138 is the premium crankcase oil for a pressure washer pump: a non foaming formula made to protect the critical parts of most pressur...
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Pressure washer pump oil
A triplex pump runs its plungers in an oil bath, and that oil picks up water and wear metal. Change it after the first 25 hours on a new machine and every 50 hours or once a season after that, with a pump oil, not motor oil: pump oil is formulated for the seals and the temperature of a pump crankcase. The Simpson 80138 is the crankcase oil for Simpson pumps and fits most triplex pumps.
Pump guard and winter storage
Water left in a pump freezes, expands and cracks the manifold, which is the most common pressure washer death in the northern states. Pump guard is a non toxic antifreeze and lubricant: connect the bottle to the inlet, pull the trigger until it runs out the outlet, and the pump is protected for the winter and lubricated for spring. Do it before any storage longer than a month.
O rings, seals and the inlet filter
A machine that surges, loses pressure or drips at the connections usually has a torn o ring at the hose or gun coupling, or a clogged inlet filter starving the pump. The Simpson 80151 kit carries the replacement o rings and the inlet filter screen; replacing them takes five minutes and saves a service call.
Pump care we recommend
Simpson 80138 for the seasonal oil change
The Simpson 80138 pump crankcase oil is the oil change a triplex pump needs every 50 hours.
Simpson 80273 before winter
The Simpson 80273 pump guard protects the pump from freezing and lubricates it for storage.
Simpson 80151 for leaks and surging
The Simpson 80151 o ring and filter kit replaces the seals and the inlet screen that cause most pressure loss.
Shipping and returns on accessories
Free shipping to the lower 48. Hoses, reels, nozzles, guns and cleaners ship by ground at no charge. Orders are prepared within 0 to 1 business days and delivery takes 5 to 8 business days.
Fit before you order. Check the connection on your machine, quick connect or threaded, and the pressure rating of the part against your machine's PSI. The product page lists both, and a call to (219) 327-1138 confirms it.
Returns. Unused accessories in original packaging can be returned within 30 days of delivery. A 20 percent restocking fee applies and return shipping is the buyer's responsibility. Full terms are on the refund policy and shipping policy pages.
Pressure Washer Pump Oil and Protectors questions, answered
How often should I change pressure washer pump oil?
After the first 25 hours on a new machine, then every 50 hours or once a season. Use a pump oil, not motor oil.
Do I need pump guard?
If the machine sits for a month or sees a freeze, yes. Water left in the pump cracks the manifold when it freezes. Pump guard displaces the water and lubricates the seals.
Will these fit a non Simpson machine?
The oil fits most triplex pumps and the pump guard fits any machine. The o ring kit fits standard quick connect fittings; check your machine's product page for its own seal kit or call and we confirm.
Why does my pressure washer surge or lose pressure?
Usually a torn o ring letting air in at a coupling, a clogged inlet filter, or a worn nozzle. Replace the o rings and the filter first; they are the cheap fix.
How does shipping work on accessories?
Shipping is free to the lower 48 states by ground. Orders are prepared within 0 to 1 business days and delivery takes 5 to 8 business days. Accessories ordered with a machine ship separately by ground while the machine goes by freight.
Are these sold by an authorized dealer?
Yes. High Pressure Car Washer is an authorized dealer for BE Power Equipment, Cam Spray, Kranzle, Makinex, Pressure-Pro and Simpson, and everything ships new from the manufacturer with its factory warranty.