TM-9-2350-311-20-1

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS

AUGUST 1994

TM-9-2350-311-20-1 - Page 977 of 1275

10-23 UNIVERSAL JOINTS — CONTINUED

c. Inspection and Repair — Continued

4

5

6

7

8

9

Inspect adapter (5) for cracks, distortion, and broken or missing splines. Replace adapter if cracked or

distorted, or splines are broken or missing.

Check:

Size and fit of new parts

Wear limits

(a) Pitch diameter (A)

TM 9-2520-234-35

(b) Major diameter (B)

3.8800 to 3.8850 in. (9.8552 to 9.8679 cm)

3.8780 in. (9.8501 cm)

(c) Minor diameter (C)

3.3460 to 3.3470 in. (8.4988 to 8.5014 cm)

3.3445 in. (8.4950 cm)

(d) Finish (splines)

25 polished

Check center plate (12) concentricity of mating surfaces with center bore, ensuring Total Indicator Reading

(TIR) is within 0.0040 in. (0.102 mm). Inspect for distortion, ensuring mating surfaces square to within 0.0040

in. (0.102 mm) TIR.

Replace bumper retainers (15) as appropriate.

Replace bumpers (16) as appropriate.

.

Check two journal assemblies (11 ) for damage or defects. Check for play between bearing caps and spider.

Replace universal joint if play is excessive.

10-60

TM 9-2350-311-20-1