Service manual

DUAL PRESSURE MAIN RELIEF VALVE (S/N

512811001 & Above) W/Select Valve (JEM) (Cont’d)

Checking The High Setting

The tools listed will be needed to do the following

procedure:

MEL10003 – Hydraulic Tester

MEL10006 – Hydraulic Test Kit

Turn the key switch to the OFF position. Before the

engine stops running, turn the key switch all the way to the

left to release the hydraulic pressure at the front auxiliary

quick couplers.

Lift and block the loader. (See Page 1–1.).

Connect the hydraulic tester to the auxiliary quick coupler

[A].

The IN port on the tester connects to the female coupler

on the loader.

The OUT port from the tester connects to the male

coupler on the loader.

The hydraulic tester must be in the fully open

position before you start the engine.

I–2024–0284

W–2017–0286

Put jackstands under the front axles and rear

corners of the frame before running the engine

for service. Failure to use jackstands can allow

the machine to fall or move and cause injury or

death.

Obtain a 3/8 inch (9,5 mm) I.D. hose (Item 1) [B] with a

3000 PSI (20685 kPa) rating or greater.

The hose loop (Item 1) [B] should be approximately of 28

inches (711 mm) in length (including quick couplers).

A small male coupler (Item 2) [B] is needed for one end

of the hose, and a small female coupler (Item 3) [B] is

needed for the other end of the hose.

Use the correct fittings and O–rings to connect the

couplers to the hose.

Drill orifice (Item 1) [C] size to 0.070 inch (1,8 mm). Install

the threaded orifice (Item 1) [C] in the male coupler (Item

2) [C] and install the coupler on the fitting.

P–05195

P–04757

–2–24–

853, 853H Loader

Service Manual

P–04717