SERVICE MANUAL | 3570 Series Plunger Pumps
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(763) 780-5440 | [email protected] | www.catpumps.com
Bearing Covers
(Check for leaking oil)
Crankcase Oil Seals
(Check for leaking oil)
Inspection of the crankcase for leaks is an essential step in the preventive maintenance of a pump. Worn seals and O-rings not only can create
a mess with leaking oil, but can lead to premature parts wear and damage due to low crankcase oil level.
Crankcase oil that appears cloudy or milky in the Oil Bubble Gauge indicates the presence of water in the crankcase. A water/oil mix does
not provide enough lubrication to the components in the drive end and will cause damage. This damage can occur on the plunger rods or
the crankshaft and connecting rods. Also, without a layer of oil on the drive end components, oxidation and rust will form on the bearings
and crankshaft. If contamination is suspected, inspect and replace the seals in the pump manifold, then clean out the inside of the crankcase
and change the oil.
Spot-check the following areas for signs of leaks and contact Cat Pumps or a local distributor for servicing crankcase if needed.
Crankcase Component Inspection