88
Engine speed too low
Oil level in reservoir low
Cold oil
Plugged filter
Partially restricted suction line
Internal damage
Cold oil
Low engine speed
Oil level in reservoir low
Air in system
Internal damage to pump
Loose or faulty fittings
Damaged O-ring
Faulty hose
Set engine at operating RPM
before trying to move machine
Fill reservoir to proper level with
approved oil; see section on
Service and Maintenance
Allow for adequate warm-up
period
Check and replace filter
Inspect for collapsed suction
hose
Replace hydrostatic pump or
motor
Allow for adequate warm-up
period
Increase engine speed
Fill reservoir to proper level with
approved oil; see section on
Service and Maintenance
Inspect and tighten all fittings on
suction line
Replace pump
Tighten or replace
Inspect; if damaged replace
Replace hose
Hydrostatic system responding
slowly
Noisy hydrostatic system
External oil leaks
SUGGESTED REMEDY
PROBLEM
POSSIBLE CAUSE
HYDROSTATIC SYSTEM CONTINUED
IX.
TROUBLE SHOOTING
Summary of Contents for STS12
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