SkyTrak 3606 Service Manual - Manual (Page 261)

Hydraulic System
9-67
b. Main Control Valve Removal
1. Park the vehicle on a firm, level surface, fully retract
all hydraulic cylinders, ground the attachment (if any),
place the travel select lever in NEUTRAL (N), engage
the park brake switch and shut the engine OFF.
2. Unlatch, unlock and open the engine cover. Allow the
hydraulic fluid to cool.
3. Thoroughly clean the pilot select manifold, main
control valve, optional auxiliary hydraulic control
valve (IF EQUIPPED) and surrounding area,
including all hoses and fittings, before proceeding.
4. Label or otherwise mark the hydraulic hoses at the
main control valve, pilot select manifold, and, IF
EQUIPPED, the auxiliary hydraulic control valve.
Place a suitable container to catch hydraulic fluid
drainage beneath the rear ballast weight. Disconnect
and cap all hoses and fittings, etc. Label and
disconnect all wire terminal leads.
5. Remove the four hex nuts (37, Fig. 9– 51) and lock
washers (36) securing the main control valve (2) to
the main valve bracket (5). Remove the four carriage
bolts (9) from beneath the vehicle frame, and remove
the four plain washers (28) and spacers (4) from
beneath the main valve bracket.
6. Remove the entire valve plate assembly, including
the pilot select manifold, main control valve and, IF
EQUIPPED, the optional auxiliary hydraulic control
valve from the vehicle.
7. Wipe up any hydraulic fluid spillage in, on, near and
around the vehicle and the work area.
WARNING: Hot hydraulic fluid can cause
severe burns. Wait for hydraulic fluid to cool
before servicing any hydraulic component.
WARNING: Escaping hydraulic fluid under
pressure can penetrate the skin, causing seri-
ous injury. Relieve hydraulic pressure before
servicing any hydraulic component.
Model 3606 • Origin 10/99