INSTALLATION - TM-10-3930-607-150190

HYDRAULIC

attached to the filter head, all oil must enter the head

4. Inspect all hoses, fittings and tubes. Replace

and pass through the filter before entering the reservoir

any hose, tube or fitting that is frayed, cracked, cross-

area of the tank. Therefore, foreign matter is removed

threaded or otherwise deteriorated to a point where

from oil being added to the tank and metal particles or

satisfactory service is doubtful. Check tank hoses for

other material from failing hydraulic components are

softness and peeling or flaking on the inside.

prevented from contaminating the supply of oil.

CAUTION:

Contained in the can is a filter, relief valve assembly

Any foreign particles or loose

and a pressure spring. The can assembly is secured in

material in the tank outlet hoses may

the tank by the filter head and necessary screws.

be drawn into the hydraulic system.

The filter will not catch the material

A 2.25 inch tube, flanged near the top and flared at the

until it passes through the hydraulic

bottom, tension spring and bell-shaped valve make up

system.

the relief valve assembly. The valve is held against the

flared end of the tube by the tension spring which is

D. INSTALLATION

hooked to the upper end of the tube.

1. Follow the reverse of removal procedures.

When the filter is assembled and installed, the pressure

2. Inspect hoses for general condition and replace

spring is placed between the head and valve flange,

any that are faulty.

forcing the flange against the top of the filtering element

and seating the element on the bottom of the can. An

3. Connect hoses.

oil seal is formed between the flange and element,

4. Install the hydraulic filter.

element and can, and valve and seat. Also, oil leakage

5. Fill the tank to the full level.

at the filter assembly and tank junction is prevented by

two gaskets, one between tank and can flange and the

CAUTION:

other between can flange and head flange.

Never operate the engine without oil

in the hydraulic system.

A few

Oil enters the head cavity, passes into the valve tube to

revolutions without oil may damage

the relief valve, flows around the outside of and then

the hydraulic pump.

through the element where it enters the tank below the

oil level. f for any reason the oil cannot pass through

Every 5000 hours drain the oil out of the tank. Remove

the element, the relief valve is forced off of its seat and

air cleaner and filter. Flush tank making sure the screen

allows it to enter the tank without being filtered.

is clean and no contaminates are left in the tank.

B. SERVICE

FULL-FLOW FILTER

NOTE:

A. GENERAL

When a new truck has been in

operation for 200 hours, replace the

Maximum protection against foreign particles is given to

filter element. After that, replace the

the hydraulic components by a full-flow filter in the

element every 2000 hours or once a

system. (Fig. 12)

year.

Remove the element as

follows:

Since both the filler tube and returning oil lines are

B-154