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SJ1044 TH, SJ1044 THS, SJ1056 TH, SJ1056 THS, SJ1256 THS
230790ABA
Section 4 – Troubleshooting Information
Electrical System
2.
Defective relay 220CR.
Check continuity through contacts of relay (pin 30
to 87a with coil de-energized).Replace if defective
With following conditions:
▪
No Frame Level Left
3.
Loose or broken wire 65A from relay 65CR pin87
to relay 28LCR pin 30
Check continuity. Replace if defective
4.
Frame angle sensor defective.
With boom below 40° and frame level check for
voltage on wire 28L (pin 6). Replace if defective
5.
Loose or broken wire 28L to connector P31 pin 29
Check continuity. Replace if defective
6.
Loose or broken wire 28L from connector J31 pin
29 to relay 28LCR pin 86
Check continuity. Replace if defective
7.
Loose or broken wire 00 from 28LCR pin 85
Check continuity. Replace if defective
8.
Relay 28LCR defective
Check continuity through contacts of relay (pin 30
to 87a with coil de-energized). Replace if defective
9.
Loose or broken wire 28A from 28LCR pin 87 to
J31connector pin 31
Check continuity. Replace if defective
10.
Loose or broken wire 28A from P31 connector pin
31 to frame level left enable solenoid J74 pin 1
Check continuity. Replace if defective
11.
Loose or broken wire 00 from frame level left
enable solenoid J74 pin 2 to ground
Check continuity. Replace if defective
12.
Defective frame level left solenoid 2H-28A
Replace if defective
With following conditions:
▪
No Frame Level Right
13.
Loose or broken wire 65A from relay 65CR pin87
to relay 28RCR pin 30
Check continuity. Replace if defective
14.
Frame angle sensor defective.
With boom below 40° and frame level check for
voltage on wire 28R (pin 6). Replace if defective
15.
Loose or broken wire 28R to connector P31 pin 28
Check continuity. Replace if defective
16.
Loose or broken wire 28R from connector J31 pin
28 to relay 28LCR pin 86
Check continuity. Replace if defective
17.
Loose or broken wire 00 from 28RCR pin 85
Check continuity. Replace if defective
18.
Relay 28RCR defective
Check continuity through contacts of relay (pin 30
to 87a with coil de-energized). Replace if defective
19.
Loose or broken wire 28B from 28RCR pin 87 to
J31connector pin 31
Check continuity. Replace if defective
Содержание SJ1044 TH
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