TM-5-2330-378-14-P

SEMITRAILER, LOWBED: 40 TON CONSTRUCTION EQUIPMENT TRANSPORTER M870 AND M870A1

TECHNICAL MANUAL; OPERATOR'S, UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL (INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST)

JUNE 1999

TM-5-2330-378-14-P - Page 208 of 524

TM5-2330-378-14&P

4-55. MULTIFUNCTIONVALVE REPLACEMENTAND OPERATINGTEST(M870).

ThisTaskCovers:

a.

Removal

b.

Installation

c.

OperatingTest

Initial Setup:

Tools/Test Equipment:

- Tape, antiseizing (Item 21, Appendix F)

- Tool kit, general mechanic's:

automotive

- Lockwasher

(Item 18, Appendix

1)

(Item 7, Appendix B)

Equipment Conditions:

Materials/Parts:

- Planks removed from stowed position (pare 2-8).

- Detergent (Item 4, Appendix F)

NOTE

The multifunction valve is sometimes called the "air pressure relay valve" or "spring

brakevalve."

a.

REMOVAL

FRONT

1.

Open drain cocks (para 3-8).

2.

Tag and disconnect 11 air hoses (1)

from multifunction valve (2).

2

1

3.

Remove multifunction

valve (2),

lockwasher (3), and cross tube fitting

(4)frorn mounting bracket (5). Discard

0

lockwasher.

NOTE

0

FORWARD

•

Repair

is limited

to the

replacement

of hardware.

•

Wrap threaded

ends of all

brass fittings with two turns of

4

antiseizing tape. Antiseizing

tape is not required for brass-

5

to-brass fittings.

3

AIR RESERVOIR

OMITTED FOR CLARITY

2

4-120