Marathon RJ-88SC, RJ-250VL, RJ-100SC, RJ-250SC TROUBLE-SHOOTING Chart, Problem Cause Solution

2 MAINTENANCE

TROUBLE-SHOOTING CHART 2-15

PROBLEM	CAUSE	SOLUTION
UNIT WILL NOT START	( 1) No electrical power to unit	( 1A) Turn on main disconnect
		( 1B) Replace fuses or reset breakers
	( 2) No electrical power to control	( 2A) Check primary and secondary
	circuit	sides of transformer
		( 2B) Check for correct voltage. Check
		control fuses.
		( 2C) Check stop button
		( 2D) Check start button to be sure con-
		tact closes when depressed
	( 3) No electrical power to motor	( 3A) Check heater resets
U N I T W I L L N O T C O N T I N U E R U N N I N G	( 1) Motor starter is in-operative	( 1A) Check motor starter coil & wiring
WHEN START BUTTON IS RELEASED	( 2) Motor starter auxiliary contacts are inop-	( 2A) Check motor starter contacts and
	erative	wiring
	( 3) Reverse Button is inoperative	( 3A) Check reverse button to be sure
		contacts are closed
		( 3B) Check wiring
	( 4) Secondary contact on start button	( 4A) Check contact, wired black and
	is inoperative	orange, to be sure it is operating
		properly
		( 4B) Check wiring
MOTOR RUNS BUT RAM DOES NOT MOVE	( 1) Insufficient oil in reservoir	( 1A) Fill reservoir with oil
NORMALLY	( 2) Low relief pressure	( 2A) Check relief pressure (refer to
		PROCEDURES-HYDRAULIC PRESSURE
		CHECK and PRESSURE SETTINGS for
		correct pressure.
		( 2B) Clean orifice in relief valve and
		reset pressure
		( 2C) Check 'O" rings on relief valve for
		damage or leakage
	( 3) Oil leakage in cylinder	( 3A) Check cylinder for bypassing
		( 3B) Replace seal kit, inspect rod and
		cylinder tube for scoring or nicks
		( 3C) Replace cylinder
	( 4) Defective pump	( 4A) Replace pump
	( 5) Oil leakage from hose fittings	( 5A) Tighten hose fittings
	( 6) Low voltage	( 6A) Check voltage
	( 7) Pump may be driven in the wrong	( 7A) Stop immediately to prevent seizure.
	direction of rotation	Check direction of drive rotation (prop-
		er rotation direction is indicated by
		arrow on motor)
	( 8) Shaft broken, or shaft key sheared	( 8A) Visually inspect motor and pump shaft
		and hub couplings for damage. Replace
		if necessary.
	( 9) Intake pipe from reservoir blocked, or oil	( 9A) Drain system. Add clean fluid of proper
	viscosity too heavy to prime	viscosity and specifications. Filter as
		recommended. Check system filter for
		cleanliness.
	( 10) Intake air leaks (foam in oil or sounds	(10A) Check intake connections. Tighten
	like gravel in pump)	securely
	( 11) Units shift slowly	( 11A) Flow control valve (restrictor) clogged ,
		remove and clean orifice.
	( 12) Valve response sluggish	( 12A) Contaminated oil-drain and flush
		system.
		( 12B) Inadequate voltage, check voltage,
		check coil
		( 12C) Disassemble valve and clean
	( 13) Loose hub coupling	( 13A) Tighten set screws on hub coupling
		halves
UNIT WILL NOT REVERSE	( 1) Solenoid valve is in-operative	( 1A) Check coil in solenoid valve
	( 2) Reverse button in-operative	( 2A) Check reverse button contacts