Section II. HYDRAULIC CONTROL VALVE MAINTENANCE
MAIN HOIST BOOST, AUXILIARY HOIST, LIFT BOOST CONTROL VALVE ASSEMBLY
Shop Equipment Auto-Maintenance and Repair, FM Supply No. 1
Tool Outfit Hyd System; Test and Repair, 3/4 Ton Trailer Mtd
Control valve removed. (Refer to TM 5-3810-306-20.)
4. DISASSEMBLE RELIEF VALVE (5).
a. Remove preformed packing (18) and
The following procedure outlines
washer (9) from cartridge (8).
disassembly for one section of the
All additional valve
b. Remove locknut (20), adjusting screws
sections will be identical.
(19), preformed packing (18), spring (17)
and plunger (16).
1. REMOVE FITTINGS FROM VALVE BANK AS
REQUIRED. SAVE FOR INSTALLATION.
c. Remove preformed packing (14) and
backup ring (15) from plunger (16).
2. REMOVE TIE BOLTS (2) SECURING VALVE
d. Remove floating seal (12) and check valve
SECTIONS AND REMOVE PREFORMED
snubber (13) from cartridge.
PACKINGS (21) AND (22).
e. Remove poppet (11) and retainer (10)
3. REMOVE RELIEF VALVE (5) FROM INLET
f. Remove preformed packing (6) and back-
up ring (7).
Keeping preformed packings and
5. DISASSEMBLE VALVE SECTION (33).
rings in order during disassembly will
aid in reassembly.
a. Remove two screws (38) and valve cap