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Printed in U.S.A.
5-4
918070/FP0811
TRAVELING GEAR
BUCKET, BOOM AND DOZER BLADE
Problem
Possible Cause
Corrective Action
Machine will not travel in any
direction
Foreign object jammed in track
Remove object
Gears not operative
Repair gears. Contact authorized service cen-
ter
Machine will not travel straight
forward or backward
Foreign object jammed in track
Remove object
Track tension unequal
Adjust track tension; ; see “Checking and
Adjusting Track Tension” on page 4-24
Travel valves damaged
Repair/replace valves. Contact authorized
service center
Problem
Possible Cause
Corrective Action
Rotating swing frame is diffi-
cult or impossible
Swing lock pin engaged
Release swing lock pin
Insufficient lubrication
Lubricate swing gear using remote grease
fitting
Front end attachments do not
work or work only at a low
performance level
Low hydraulic fluid level
Add hydraulic fluid; see “Checking Hydraulic
Oil Level” on page 4-17
Low engine power
See “Engine” troubleshooting on page 5-1;
contact authorized service center
Engine to pump coupling or hydraulic pump
damaged
Contact authorized service center
Pressure limiting valves set too low
Contact authorized service center
Hydraulic cylinder damaged
Contact authorized service center
Control valves damaged
Contact authorized service center
Hydraulic cylinders lower too
quickly
Seals contaminated or damaged
Contact authorized service center
Heavy internal leakage at control spools
Contact authorized service center
Secondary cartridge valves damaged
Contact authorized service center
Hydraulic lines overheat
Low hydraulic fluid in hydraulic fluid reservoir
Add hydraulic fluid; see “Checking Hydraulic
Oil Level” on page 4-17
Secondary cartridges set too low
Contact authorized service center
Hydraulic fluid cooling system not in working
order
Service hydraulic fluid cooling system; contact
authorized service center
Summary of Contents for 503Z
Page 6: ...Printed in U S A iv 918070 FP0811 NOTES ...
Page 28: ...Printed in U S A 1 22 918070 FP0811 INTENTIONALLY BLANK To be removed as dealer s file copy ...
Page 90: ...Printed in U S A 3 44 918070 FP0811 NOTES ...
Page 94: ...Printed in U S A 4 4 918070 FP0811 Maintenance Label ...