TM 5-3810-306-34
Section II. HYDRAULIC CONTROL VALVE MAINTENANCE
MAIN HOIST BOOST, AUXILIARY HOIST, LIFT BOOST CONTROL VALVE ASSEMBLY
TOOLS:
Shop Equipment Auto-Maintenance and Repair, FM Supply No. 1
Tool Outfit Hyd System; Test and Repair, 3/4 Ton Trailer Mtd
SUPPLIES:
EQUIPMENT CONDITION:
Control valve removed. (Refer to TM 5-3810-306-20.)
DISASSEMBLY:
4. DISASSEMBLE RELIEF VALVE (5).
NOTE
a. Remove preformed packing (18) and
The following procedure outlines
washer (9) from cartridge (8).
disassembly for one section of the
valve bank.
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
SECTIONS
TOGETHER.
SEPARATE
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
from cartridge.
SECTION (4).
f. Remove preformed packing (6) and back-
NOTE
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
(37)
13-44