Alamo 803213C Benutzerhandbuch

INTERSTATER   03/09

Maintenance Section 5-21

© 2009 Alamo Group Inc.

Motor turns while unloaded

Scored backplate.

Remove backplate and examine

but slows down or stops when

surface condition of flat area; if scored,

load is applied

replace backplate. DO NOT LAP.

Scored or worn piston shoes.

Disassemble motor, examine condition
of shoes on pistons; replace pistons as
a complete set if necessary. DO NOT 
LAP

Low Relief Valve pressure.

Check Relief Valve for proper pressure
setting; adjust pr replace Relief Valve.

Motor will not turn.

Severely scored backplate.

Disassemble motor completely.
Inspect all parts, clean all parts,
replace all worn parts and flush
hydraulic system.

Motor free wheels.

Oil-flow and pressure shut off

When the hydraulic system is shut off,

going to motor.

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 not free-wheel as long as charge 
pressure is maintained to and from 
the motor.

Excessive Case Drain flow.

Excessive internal wear in motor.

Disassemble motor; inspect parts and
replace as necessary. Case Drain
flow should not exceed 1.5 GPM at full
pressure.