Service manual

Section 9
9-10
9.6 HYDRAULIC RESERVOIR
The hydraulic reservoir (Fig. 9–5) includes the engine
mounting crossmembers. The reservoir is secured to the
right side of the vehicle frame with 1-8 x 2-3/4" Grade 8
hex-head capscrews, 1" hardened washers and 1-8 hex-
lock nuts.
Occasionally, fluid may seep, leak or be more forcefully
expelled from the filter head (15, Fig. 9–5) or breather
when system pressure exceeds the rating of the filter
head or breather. If the return filter becomes plugged,
return hydraulic oil will bypass the filter when pressure
reaches 25 psi (1,725 bar) and return to the reservoir
unfiltered.
Carefully examine fluid seepage or leaks from the
hydraulic reservoir to determine the exact cause. A
slightly different breather was installed on vehicles after
Serial Number 10017 to help eliminate potential seepage
problems. Clean the reservoir and note where seepage
occurs, if any does occur.
Leaks from a cracked or damaged reservoir require that
the reservoir be removed from the vehicle, flushed
completely with water, and repaired by a certified welder
using approved techniques. If these conditions cannot be
met, the reservoir must be replaced in its entirety. Con-
tact Sky Trak or the nearest Sky Trak distributor should
reservoir welding or replacement be required.
Hydraulic Reservoir Replacement
In order to remove the hydraulic reservoir, the engine and
transmission assemblies must first be removed, along
with all brackets, hoses, wiring, etc., Follow the proce-
dures for engine and transmission removal in the appro-
priate sections of this manual.
After the engine and transmission assemblies and all
related brackets, hoses, wiring, etc. are removed, the
hydraulic reservoir must be supported with a suitable
device and unbolted from the vehicle frame. Install the
replacement reservoir and secure it to the vehicle with
1-8 x 2-3/4" Grade 8 hex-head capscrews, 1" hardened
washers and 1-8 hex-lock nuts (Fig. 9–5). Torque the
nuts to 585 lb/ft (793 Nm).
DANGER: Risk of death or severe personal
injury. NEVER weld in, on, near or around the
hydraulic reservoir. Hydraulic fluid and fumes
can cause the reservoir to explode.
Model 3606 • Origin 10/99