TM-9-2350-311-34-1

HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS: HOWITZER, MEDIUM, SELF-PROPELLED, 155MM

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL

SEPTEMBER 1994

TM-9-2350-311-34-1 - Page 133 of 352

TM 9-2350-311-34-1

b. Inspection and Test

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Check gearbox housing (17). Replace if cracked or distorted.

Check impeller (3). Replace if nicked, broken, or cracked.

NOTE

Use steps 3 thru 5 to measure gearbox backlash.

Secure gearbox (8) to prevent input shaft (18) from rotating.

Install fabricated measuring bar on output shaft (19) using washers or spacers (20) as required and install nut

(1). Tighten nut using socket.

Push down on measuring bar as far as possible and position dial indicator as shown. Pull up on measuring bar

and check dial indicator reading. Reading should be 0.032 to 0.068 in. (0.81 to 1.73 mm) (0.004 to 0.008 in.

[0.10 to 0.20 mm] backlash).

Discard gearbox (8) if backlash is out of tolerance.

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