Grove RT9130E - Troubleshooting Crane Components and Accessories

Published 08-25-09, Control # 077-04 3-9
RT9130E SERVICE MANUAL ELECTRICAL SYSTEM
3
GROVE
Troubleshooting Crane Components and
Accessories
1. If a crane component or accessory won’t work when it is
supposed to, check and replace fuse. Also check and
replace its relay as needed.
2. Check the component or accessory, its control or
triggering component, and its circuit for continuity
problems and other problems. Repair any faulty
component or accessory or trigger. Repair wiring if
faulty.
The following circuit designs apply (connecting wiring
and passage through swivel slip ring per control module
-- as applicable -- is understood):
- Windshield wiper motor and windshield washer
pump motor. Fuse F9, wiper/washer switch, motors
in parallel, grounds.
- Heater or A/C fan. Fuse F19, FAN switch, fan motor,
ground.
- Cab circulating fan. Fuse F11, switch, motor,
ground.
- Defroster fan. Fuse F12, switch, motor, ground.
Parallel circuit to LED indicator in switch to ground.
- Grid heaters. 125 amp fuses, relays K601 and
K602, grid heaters, ground (relays controlled by
Cummins ECM.
- Transmission gear shift function. Fuse F8, electric
shifter, five solenoid valves in parallel in
transmission, ground.
- Transmission drive select function. Fuse F10,
DRIVE AXLE select switch, 2WD solenoid valve,
ground. Parallel circuit to LED indicator in switch to
ground.
- Outrigger extend/retract function. Fuse F14,
RETRACT/EXTEND switch, extend solenoid valves
in parallel with retract solenoid valves in integrated
valve, grounds.
- Outrigger extension cylinder functions. Fuse F14,
selector switch for left front, left rear, right rear, and
right front cylinders, cylinder solenoid valves,
grounds.
- Outrigger stabilizer cylinder functions. Fuse F14,
selector switch for left front, left rear, right rear, and
right front cylinders, cylinder solenoid valves,
grounds.
- Crane function. Fuse F13, CRANE FUNCTION
switch, seat switch, armrest switch, ground. Parallel
circuit to LED indicator in switch to ground.
- Main and Auxiliary Hoist Rotation Indicators. Fuse
F18 branch for each hoist (driver assembly, sensor,
driver assembly, ground). Parallel branch through
thumper to driver assembly.
- Main Hoist. For hoist up, Fuse F16, LMI CPU, MAIN
HOIST switch, main hoist up solenoid valve,
ground. For hoist down, Fuse F17, MAIN HOIST
switch, main hoist down solenoid valve, ground.
Parallel circuit to LED indicator in switch to ground.
For main hoist high speed up and down, Fuse F17,
MAIN HOIST switch, main hoist high speed
solenoid valve, ground. Series circuit through diode
to main hoist down solenoid valve.
- Auxiliary Hoist. For hoist up, fuse F16, LMI CPU,
AUX HOIST switch, auxiliary hoist up solenoid
valve, ground. For hoist down, fuse F17, AUX
HOIST switch, auxiliary hoist down solenoid valve,
ground. Parallel circuit to LED indicator in switch to
ground. For auxiliary hoist high speed up and down,
Fuse F17, AUX HOIST switch, auxiliary hoist high
speed solenoid valve, ground. Series circuit through
diode to auxiliary hoist down solenoid valve.
- LMI. Fuse F16, LMI CPU and LMI crane
components, grounds.
- Lockout function. Fuse F16, LMI CPU, three lockout
solenoid valves in parallel (inner mid telescope out,
outer mid telescope out, lift down), grounds. (During
lockout, this circuit must be open.)
- Rear axle oscillation lockout function. Fuse F16,
LMI CPU, oscillation solenoids, ground.
- Swing brake release function. Fuse F13, SWING
BRAKE release switch, swing brake release
solenoid valve, ground.
- Park brake release function. Fuse F10, PARK
BRAKE switch, park brake release solenoid valve,
ground.
- Axle differential lock function (option). Fuse F10,
DRIVE AXLE select switch, AXLE DIFF switch, axle
differential lock solenoid valve, ground. Parallel
indicator branch fuse F10, indicator, differential lock
indicator switches, ground.
- Skylight wiper motor. Fuse F11, wiper switch (on
motor), motor, grounds.
- Hydraulic oil cooler control. Transmission
temperature switch, hydraulic oil temperature
switch, oil cooler solenoid valve, ground. Each
normally closed switch opens on rising hydraulic oil
temperature (transmission switch at 230
°
F,
hydraulic switch at 120
°
F) to de-energize the oil
cooler solenoid valve so fluid from Pump No. 4 flows
through the hydraulically driven cooler fan motor to