3-137.4. PRESSURE CONTROL VALVE - MAINTENANCE INSTRUCTIONS.
All parts must be thoroughly cleaned and kept clean during inspection and assembly. Contamination in
unit will cause excessive wear, leakage and decreased service life. Clean in accordance with standard
procedures for hydraulic parts. Do not use compressed air to dry parts unless the air is completely filtered,
in order to remove water and contaminants.
Coat all internal parts lightly with lubricating oil.
Install in body (27).