TM-5-5420-203-14

BRIDGE, ARMORED VEHICLE LAUNCHED, SCISSORING TYPE CLASS 60 & CLASS 70 ALUMINUM, 60 FOOT SPAN; FOR M48A5 AND M60 LAUNCHER

TECHNICAL MANUAL; OPERATOR’S, UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE

JUNE 1991

TM-5-5420-203-14 - Page 250 of 298

TM 5-5420-203-14

4-6. HEU MAINTENANCE INSTRUCTIONS

TOOLS/EQUIPMENT:

General Mechanics Tool Box SC 5180-90-N26

Wrench, Cylinder Rod, (item 1, Appendix B)

Wrench, Spanner (item 2, Appendix B)

Installation, Tool seal pack (item 4, Appendix B)

SUPPLIES:

Kit, Overhaul, Scissoring Cylinder (item 11, Appendix E)

EQUIPMENT CONDITIONS: Equalizer plate removed (page 3-20)

PERSONNEL: Two

a. Disassembly.

FRH hydraulic fluid may contain Tricresyl Phosphate (TCP) which, if taken internally, can

cause paralysis. Hydraulic fluid may be absorbed through the skin. If hydraulic fluid gets on

skin, wash with soap and water as soon as possible.

(1) Using cylinder rod and spanner wrenches, remove clevis (1) from hydraulic cylinder rod (2).

(2) Remove four screws (3) from retaining plate (4) securing scraper (5) to cylinder bushing (6).

Remove and discard scraper (5).

(3) Remove cylinder bushing (6) from land ring flange (7).

(4) Remove wiper ring (8) from cylinder bushing (6). Discard

wiper ring (8).

(5) Remove eight cap screws (9) from land ring flange (7).

(6) Remove land ring flange (7) and separate

retainer (10) and O-ring (11) from

ring flange (7) Discard O-ring (11) and retainer (10).

(7) Remove seal pack assembly (12) from

launching cylinder head (13).

NOTE

No further disassembly of the hydraulic cylinder is authorized at

this maintenance level.

4-4

Change 3

WARNING

13