Western DEFENDER - Hydraulic System; Annual Fluid Change

Lit. No. 72451, Rev. 03 29 October 15, 2019
MAINTENANCE
4. Remove the drain plug.
5. Completely drain the reservoir and reinstall the
drain plug.
6. Fill the reservoir to 1-1/2" to 2" from the top
with high-performance hydraulic uid rated to
–40°F (–40°C), or other uid conforming to
Military Specication MIL-H-5606 A, such as
Mobil Aero HFA or Shell AeroShell
®
Fluid 4.
7. Reinstall the ll plug.
HYDRAULIC SYSTEM
Annual Fluid Change
1. Perform this operation with the snowplow attached
to the vehicle. Park the vehicle on a hard, level
surface.
2. Lower the blade to the ground. Turn the control
OFF.
3. Remove the ll plug.
NOTE: Remove ll plug slowly to relieve any
pressure in reservoir.
CAUTION
Change the uid at the beginning of each
plowing season. Failure to do this could
result in condensation buildup during the
non‑plowing season.
CAUTION
Do not mix di󰀨erent types of hydraulic uid.
Some uids are not compatible and may cause
performance problems and product damage.
AeroShell
®
is a registered (
®
) trademark of Shell Oil Company.
Breather/Fill Plug
Reservoir
Drain Plug