Advance acoustic Exterra 56507000, Quick Start Troubleshooting Manual

Page: 47 / 89

FORM NO. 56043110 - Exterra
™
- 47
HOPPER SYSTEM
TROUBLESHOOTING GUIDE
Troubleshooting Guide
Symptom
Hopper will not lower
Part A: Electrical Control Circuit
Note: Do all testing with the engine running at high speed and the hopper lower (DN) switch
pressed and held.
Hopper will not lower
1. Press & hold hopper
lower switch
2. Back probe the S9
hopper solenoid coil
wires (+Vio & Yel/Grn)
should read 12V’s
Check S9 coil wiring
continuity, repair if faulty
Is there 12V’s at the S9 coil ?
Check S9 coil resistance
Spec. 9 Ohms
See hydraulic hopper raise
troubleshooting section B
Replace the S9
solenoid coil.
Press & hold hopper lower SW.
Check for continuity @ the
ribbon connector (*) for pins
J3-1 & J3-8 on the A2 control
box.
Replace the A2
control box assy..
Does the hopper
lower ?
Ribbon pins test
open replace the
touch pad switch
panel
Yes
No
No
Yes
No
* Ribbon connector see Electrical System Figure 1 for detail pin call-outs.
No
Yes
Yes