cascade corporation 14J Series, Service Manual

Page: 7 / 58

6921413 4
TROUBLESHOOTING
3.1
General Procedures
3.1-1
Truck System Requirements
• Truck hydraulic pressure should be within the range
shown in Specification, Section 5.1.
PRESSURE TO
THE ATTACHMENT MUST NOT EXCEED 3600 psi
(250 bar).
• Truck hydraulic flow should be within the range shown
in Specifications, Section 5.1.
• Hydraulic fluid supplied to the attachment must meet
the requirements shown in Specifications, Section 5.1.
3.1-2
Tools Required
In addition to a normal selection of mechanic's hand tools,
the following are required:
• In-line Flow Meter Kit:
10 GPM (37 L/min) − Cascade Part No. 671476
20 GPM (75 L/min) − Cascade Part No. 671477
• Pressure Gauge Kit:
5000 psi (345 bar) − Cascade Part No. 671212
• Assorted fittings, hoses, and quick-disconnect couplers
as required.
3.1-3
Troubleshooting Chart
Determine All The Facts –
It is important that all the
facts regarding the problem are gathered before
beginning service procedures. The first step is to
talk to the equipment operator. Ask for a complete
description of the malfunction. The following
guidelines can then be used as a starting point to
begin troubleshooting procedures:
Clamp Circuit
• Attachment drops load after it has been picked up.
• Attachment will not carry load up to rated capacity.
• Attachment arms have uneven travel.
• Attachment arms travel slowly.
• Attachment arms will not move.
To correct one of these problems, see Section 3.3-1
and 3.3-2.
Rotate Circuit
• Attachment rotates in one direction only.
• Attachment will not rotate rolls up to rated capacity.
• Attachment will not rotate.
To correct one of these problems, see Section 3.4-1
through 3.4-3.
WARNING: Before servicing any hydraulic
component, relieve pressure in the system.
Turn the truck off and move the truck
auxiliary control valves several times in
both directions.
After completing any service procedure, always test
the attachment through several cycles. First test the
attachment empty to bleed any air trapped in the
system to the truck tank. Then test the attachment
with a load to make sure it operates correctly before
returning to the job.
Stay clear of the load while testing. Do not raise the
load more than 4 in. (10 cm) off the floor while testing.
GA0013.eps
GA0014.eps
AC0127.eps
Flow Meter Kits
671476 – 10 GPM (37 L/min)
671477 – 20 GPM (75 L/min)
(2) No. 8-12
JIC/ O-Ring
(2) No. 6-8 JIC Reducer
Flow Meter
Pressure Gage Kit
671212
Pressure Gauge
✷
No. 6-6 Hose
✷
No. 6 and No. 8
JIC Swivel Tee
No. 4. No.
6
✷
and No. 8
JIC/O-Ring
No. 6-8 JIC
Reducer
No. 4-6 Pip/JIC
✷
Quick-Disconnect Couplers
Male Straight Thread
O-Ring Coupler:
No. 4 (Part No. 212282)
✷
No. 5 (Part No. 210378)
No. 6 (Part No. 678592)
Female JIC Thread
Coupler:
No. 4 (Part No. 210385)
✷
No. 6 (Part No. 678591)
✷
NOTE: Diagnostics Kit 394382
includes items marked.