TM-9-2520-270-34

HYDROMECHANICAL CROSSDRIVE, TRANSMISSION HMPT 500 AND TRANSMISSlON CONTAINER ASSEMBLY

TECHNICAL MANUAL; DIRECT AND GENERAL SUPPORT MAINTENANCE

NOVEMBER 1984

TM-9-2520-270-34 - Page 362 of 933

TM 9-2520-27-34

NOTE

Top helical seat may be found either in priority

valve cover or on spring.

3. REMOVE PRIORITY VALVE PISTON (1).

a. Remove top helical seat (2), spring (3),

and bottom helical seat (4).

b. Using retaining-ring pliers, remove

piston (1).

4. CHECK PISTON (1).

a. Using micrometer caliper set, measure

outside diameter of piston (1).

b. Replace piston (1) if measurement is

less than 1.4965 inches (38.011 mm).

5. CHECK SPRING (3).

a. Using indicator caliper, measure free

length of spring (3). Replace spring

if free length is less than 5.77 inches

(146.6 mm).

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