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 76 of 352
TM 9-2350-311-34-1
4-4 MASS RING AND COUPLER
This task covers:
a. Removal
b. Inspection
c. Installation
Tools
General mechanic’s tool kit (item 14, Appx C)
Adhesive-sealant (item 3, Appx B)
Hammer (item 12, Appx C)
Seals (2) (item 1, Appx F)
Torque wrench (item 28, Appx C)
Engine and transmission separated (para 4-3)
a. Removal
1
Remove 12 screws (1), mass ring (2), and coupler (3).
2 Remove seal (4). Discard seal.
NOTE
Step 3 applies to optional coupler. Ring, cover
Standard coupler is built with solid backplate.
3 Remove ring (5), cover (6), and seal (7). Discard seal.
b. Inspection
and seal are only on optional coupler.
Inspect rear surface of coupler (3). If surface is oil-soaked, springs or washers are broken, or coupler plate is
distorted, replace coupler.
c. Installation
Adhesives are toxic and flammable. Apply adhesives only in a well-ventilated area.
Avoid contact with skin, eyes, and clothes, and don’t breath vapors. Do not use near
heat, sparks, or open flame. Read and follow all warnings and instructions on labels of
adhesives. If contact with skin or eyes is made, wash area with water and seek
medical aid immediately.
NOTE
Step 1 applies to optional coupler. Ring, cover, and seal are only on optional coupler.
1 Apply coating of adhesive-sealant to new seal (7) and install ring (5), cover (6), and seal.
2 Apply coating of adhesive-sealant to coupling seal grooves and new seal (4) and install seal on coupler (3).
4-20
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