Engine Knocks or Develops Excessive Noise

Possible

remedy

Probable

cause

Air shroud loose or damaged ---------------------------------------- Tighten air shroud. Report damaged shroud to direct

and general support maintenance.

Cylinder cooling fins clogged with dirt ---------------------------- Report malfunction to direct and general support main-

tenance.

60. Engine Knocks or Develops Excessive Noise

Possible

remedy

Probable

cause

Crankcase

oil

level

too

low

---------------------------------------

Stop engine and add

oil

proper

level.

Refer

lubrication chart.

61. Engine Oil Pressure Low

Possible

remedy

Probable

cause

Crankcase

oil

level

too

low

--------------------------------------

Stop engine and add oil to proper level. Refer to

lubrication chart.

Oil

pressure

gage

defective

-------------------------------------

Report malfunction to direct and general support

maintenance.

62. Engine Exhaust Smoky

Possible

remedy

Probable

cause

Crankcase oil level too high ---------------------------------------- Drain off excess oil to correct level.

Carburetor choked excessively --------------------------------------- Push in choke control.

Engine cold causing poor combustion ----------------------------- Allow sufficient time for engine warm up before oper-

ating the hydraulic system.

63. Fuel Consumption Excessive

Probable

cause

Possible

remedy

Choke control partially closed ---------------------------------- Open choke control.

Dirty air cleaner -------------------------------------------------------- Service the air cleaner (par. 52).

Fuel leaks ---------------------------------------------------------------- Report to direct and general support

maintenance.

64. Battery Needs Frequent Recharging

Probable

cause

Possible

remedy

Battery electrolyte level low ------------------------------------- Add battery water to correct level (par. 9).

Battery defective ------------------------------------------------------ Replace defective battery (par. 9).

65. Hydraulic Pump Fails to Deliver Sufficient Pressure

Probable

cause

Possible

remedy

High pressure relief valve out of adjustment ------------ Adjust the high pressure relief valve (par. 43).

Compensator control incorrectly adjusted -------------------- Adjust the compensator control (par. 43).

Fluid bypass valve open ------------------------------------------- Close the fluid bypass valve.

Defective fluid pressure gage ------------------------------------ Report to direct and general support maintenance,

66. Hydraulic Pump Fails to Deliver Sufficient Volume

Probable

cause

Possible

remedy

Fluid volume control incorrectly adjusted ------------------ Adjust the fluid volume control (par. 43).

Engine speed incorrect ---------------------------------------------- Set throttle for an indicated 1800 rpm.

67. Hydraulic System Pressure too High

Probable cause

Possible

remedy

High pressure relief valve set too high ------------------------- Adjust high pressure relief valve (par. 43).

High pressure relief valve defective ------------------------- Refer the malfunction to direct and general support

maintenance.

68. Hydraulic Fluid Temperature too High

Probable

cause

Possible

remedy

Low pressure filter dirty ------------------------------------------------

Report deficiency to direct and general support main-

tenance.

Reservoir fluid level low ----------------------------------------------- Fill reservoir to correct level (par. 9).

AGO 5742A