Preventing Hydraulic System Contamination

IMPORTANT: Cleanliness is very important when working on hydraulic system. Prevent contamination by assembling cylinders, hoses, couplers, and valves in a clean area of shop.

Leave protective caps on fluid openings until ready to make connection. When charging system, use a tractor or other source that contains clean oil, free of abrasive materials. Keep couplers clean. Abrasive particles, like sand or metal fragments, can damage seals, barrels, and pistons causing internal leakage.

NOTE:

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A - Piston

B - Rod Guide

IMPORTANT: To prevent contaminants from entering hydraulic system, filters must be installed at tip of supply hose (cylinder depth stop systems). Additional filters are not recommended as they will restrict oil flow and adversely affect lift time due to pressure drop.

Without filter, large dirt particles can enter cylinder and settle against top side of piston (A) where they can cut piston seal as cylinder retracts.

No filter is needed on rod end port because dirt particles entering cylinder from here will settle harmlessly against rod guide (B), away from piston seal.