Komatsu 830E-AC Shop Manual page 755

Assembly
1. Thoroughly coat all parts including housing
bores with clean type C-4 hydraulic oil.
2. If the inlet and outlet housings were removed
follow steps 3 through 5 for reassembly.
3. Install check poppet (2, Figure 8-14) and spring
(3) in spool housing (1).
4. Install new O-ring (4) in spool housing. Move
the inlet and outlet housings into position.
5. Install tie rods. Install tie rod nuts. Tighten tie
rod nuts to the torques shown in Figure 8-15.
6. Install a new O-ring (27, Figure 8-12) and wiper
(26). Install seal retainer (25).
7. Install spacer (5), spring seats (19), and spring
(4). Thread detent pin (3) into spool (14). Slight
pressure will be required to compress the
detent spring. Tighten detent pin 9-11 N·m (84-
96 in. lbs) torque. Install spring (20). Carefully
install spool into spool housing.
FIGURE 8-14. HOIST PILOT VALVE ASSEMBLY
1. Spool Housing
2. Check Poppet
3. Spring
L08038
4. O-ring
5. Outlet Housing
Hoist Circuit Component Repair
8. Apply grease to the cross holes of the detent
pin (3) to hold balls (21) and (2).
9. Slide detent sleeve (22) into cap (24) and place
over a punch. Using this punch, depress ball
(21) and insert balls (2) in detent pin cross
holes.
10. While holding down on ball (21), slide detent
sleeve (22) and cap (24) as an assembly over
the detent pin (3). Continue to insert detent
sleeve (22) until it contacts spring seat (19).
11. Secure cap (24) in place with cap screws (6).
Tighten cap screws (6) to 7 N·m (5 ft lbs)
torque. Install spacer (23) and snap ring (1).
12. Install a new O-ring (12) and wiper (13). Install
seal plate (16). Install machine screws (15).
13. Using new O-rings, install relief valve (2, Figure
8-13) in spool housing.
FIGURE 8-15. TIE ROD NUT TORQUE
1. Nut
2. Tie Rod
3. Nut
4. Tie Rod
5. Outlet Housing
L8-13