Bigdog Mower Co. ALPHA MPX, Общее руководство по обслуживанию, Страница: 19 / 40

125277 4-7 REV A
Hydraulic system
This mower is equipped with two integrated hydrostatic
transmissions. Figure 4-17
IMPORTANT: Never use hydraulic or automatic
transmission fluid in this system; use only motor oil as
specified.
Use SAE 20W50 motor oil, 15W50 synthetic oil or 20W50
synthetic oil when changing the system oil and filter.
The hydraulic expansion tank is located in front of the
engine and under the operator’s platform. Figure 4-16
Check oil level in hydraulic system after every 40 hours of
operation or weekly, whichever occurs first. Check more
often if system appears to be leaking or otherwise
malfunctioning.
When the hydraulic system oil is cold, the fluid level should
be at the “Full Cold” line on the expansion tank. Use only the
specified oil shown.
Initial system oil and filter change must be after the first 75
hours of use or 1 year whichever comes first. Thereafter,
replace filter and oil in each transmission every 2 years or 200
hours, whichever comes first.
NOTE: The filter guard must be removed to access filter.
Each transmission’s filter is located per Figure 4-17. A
standard oil filter wrench is used to change filter, threads are
right handed.
Use a BigDog
®
Mowers approved filter element only.
IMPORTANT: Dirt is the primary enemy of any hydraulic
system.
IMPORTANT: When washing the mower, direct the spray
away (especially if using a power washer) from the
transmission’s seals to prevent water intrusion and to ensure
component performance.
Top view with engine removed
A. Transaxle drive pulley
B. Transaxle drive belt C. Engine pulley
D. Tension idler
Figure 4-14
48"/54"/60" mowers
A. Spring mount B. Idler spring
Figure 4-15
B
C
D
A
A
A
B
A. Expansion tank
Figure 4-16
A