Troubleshooting

POSSIBLE TROUBLE	CAUSES	REMEDIES
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.

INTERSTATER 03/09

Maintenance Section 5-21

Alamo 803213C, FC-FL-0001 manual Troubleshooting