Komatsu PC200-8M0 Shop Manual page 862

SEN06138-00
Failure 2) When swing brake cancel switch is set to Normal position, swing holding brake does not operate.
Related infor-
mation
Cause
Defective swing brake can-
1 cel switch (internal short cir-
cuit)
Hot short circuit in wiring
2 harness
(contact with 24 V circuit)
40
40-400
Procedure, measuring location, criteria and remarks
1. Turn starting switch to OFF position.
2. Disconnect connector S25 and connect T-adapters to male side.
Between S25 (male) (13)
and (14)
1. Turn starting switch to OFF position.
2. Disconnect connector V03 and connect T-adapters to female side.
3. Turn starting switch to ON position.
4. Set swing lock switch to ON position.
Between V03 (female) (1) and ground
400 Troubleshooting of electrical system (E-mode)
E-21 Swing holding brake does not operate properly
swing brake cancel switch:
Normal
swing brake cancel switch:
FREE
PC200, 200LC, 220, 220LC-8M0
Resistance Min. 1 Mz
Max. 1 z
Resistance
Voltage Max. 1 V