REPAIR PROCEDURES
TB24 Plus&26J Plus Maintenance Manual 6-19 © Jun 2022
Table 6-10 Boom function manifold (PN.202040003176)
NO. NAME
TORQUE
FUNCTION
1 Check valve
85–95Nm (63–70ft-lb) Keep fluid flowing in one way
2 Check valve
40–45Nm (30–33ft-lb) Keep fluid flowing in one way
3 Relief valve
33.9Nm (25ft-lb) Prevent system overpressure
4
Compensator
valve
27.1Nm (20ft-lb) Release power unit pressure
5
Counterbalance
valve
34–41Nm (25–30ft-lb)
Maintain a balanced load
6 Flow valve
27.1Nm (20ft-lb) Release LS feedback pressure
7
Electro-
proportional flow
valve
36.7Nm (27ft-lb) Turntable rotation speed control
8
Electro-
proportional flow
valve
40.6Nm (30ft-lb) Boom luffing speed control
9
Electro-
proportional flow
valve
40.6Nm (30ft-lb) Boom extend/retract speed control
10
Electro-
proportional flow
valve
36.7Nm (27ft-lb) Speed control for platform level, steer and jib motion
11 Check valve
26–28Nm (19–21ft-lb) Keep fluid flowing in one way
12–1
6–way Y-type
gate valve
8Nm (6ft-lb)
Turntable rotation direction control
12–2
6–way Y-type
gate valve
8Nm (6ft-lb) Platform leveling direction control
12–3
6–way Y-type
gate valve
8Nm (6ft-lb) Boom luffing direction control
13 Relief valve
25.8–28.5Nm
(19–21ft-lb)
Turntable rotation pressure control
14–1 Relief valve
55–65Nm (41–48ft-lb) Restrict pressure for boom lowering
14–2 Relief valve
55–65Nm (41–48ft-lb) Restrict pressure for boom extending
15
6–way Y-type
gate valve
8Nm (6ft-lb)
Steer direction control
16
6–way solenoid
valve
8Nm (6ft-lb) Boom telescoping direction control
17
10–way solenoid
valve
15Nm (11ft-lb) Boom telescoping direction control
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