Service manual

AR 250

HYDRAULIC SYSTEM

Changing hydraulic fluid

1. Drain fluid by removing plug F.

2. Fill through either brass plug A.

3. Replace hydraulic fluid filter H at intervals recom-

mended in the Service Chart.

General notes

– When any hydraulic port is opened, plug quickly

to reduce risk of contamination.

– Lower lift arms to relieve hydraulic system

pressure before servicing.

– Do not use teflon tape on hydraulic pipe fittings.

Use a liquid sealant that will dissolve into the

system.

– Make sure all hydraulic connections are tight

before applying pressure to system.

– Leaks can penetrate

skin.

– Seek immediate

medical attention for oil

penetration injury.

WARNING

SERVICE

Hydraulic Test Ports

Two ports are visible at right:

– Deck drive valve pressure (3000 psi at D).

– 4-wheel drive valve pressure (2500 psi at W).

A third port for lift and power steering is located on the

left side of pressure manifold below the 4-wheel drive

valve (1200 psi).