Possible Trouble - Alamo none Operator's Manual

POSSIBLE TROUBLE

POSSIBLE TROUBLE
1. Motor turns while unloaded
but slows down or stops when
load is applied.
2. Motor will not turn.
3. Motor free wheels.
4. Excessive case drain flow.
GRASS KING 03/09
© 2009 Alamo Group Inc.
MAINTENANCE
CAUSES
A. Scored back plate.
B. Scored or worn piston shoes.
C. Low relief valve pressure.
A. Severely scored backplate.
A. Oil-flow and pressure shut off
going to motor.
A. Excessive internal wear in
motor.
Maintenance Section 5-12
REMEDIES
A. Remove backplate
examine surface condition of flat
area; if scored,
backplate. DO NOT LAP.
B. Disassemble motor, examine
condition of shoes on pistons;
replace pistons as a complete
set if necessary. DO NOT LAP.
C. Check relief valve for proper
pressure setting adjust
replace relief valve.
A. Disassemble
completely. Inspect all parts,
clean all parts, replace all worn
parts and flush hydraulic system.
A. When the hydraulic system is
shut off, either by shutting off the
engine on a closed loop system
or returning the control valve
spool to neutral on an open
center system, the motor will
free-wheel after it has leaked off.
This is inherent in the design. On
a closed loop or propulsion
system, the motor will
free-wheel as long as charge
pressure is maintained to and
from the motor.
A. Disassemble motor, inspect
parts and replace as necessary.
Case drain flow should not
exceed 1.5 GPM at full pressure.
and
replace
or
motor
not