MAGNATRAC RT1150 Operator / Technical Manual page 38

Bypass Arm (Open)
Front Collar
Rear Collar
Step 3: To make sure the bypass arm stays
"Open", we advise to rotate the "Flapper" down-
ward at this time. See picture below. If you have
not done so already, please follow steps 1-3 on
the opposite transaxle at this time.
Bypass Arm (Open)
Flapper
(Down)
Continue to the Purging Procedure at this
time.
PURGING PROCEDURE
Due to the effects air has on efficiency in hydro-
static drive applications, it is critical that it is
purged from the system.
Air creates inefficiency because of its compres-
sion and expansion rate is higher than that of the
oil approved for use in the hydrostatic drive sys-
tem.
These purge procedures should be implemented
any time a hydrostatic drive system has been
opened to facilitate maintenance, or the oil has
been changed.
Bracket with
Key Hole
Opening
38
The resulting symptoms in hydrostatic drive sys-
tems may be:
1. Noisy operation.
2. Lack of power or drive after short term
operation.
3. High operation temperature and exces
sive expansion of oil.
Before starting the steps below, make sure the
transaxles are at the proper oil level. If it is not, fill
to the specifications outlined in the FLUID AND
FILTER CHANGE PROCEDURE on page 34 in
this section.
The following procedures steps must be followed
to fully purge the hydrostatic transaxles.
Step 1: With the "bypass arms open" from your
previous steps, "enagage" your MAGNATRAC
brake lever to start the engine. Start the unit.
H - Brake Handle
Step 2: "Disengage" the MAGNATRAC brake
lever while the engine is still running. See below.
DISENGAGED
Step 3: Slowly move track control handles A and
B, in both forward and reverse directions, approx.
5 to 6 times. See picture at the top left of the next
page.
Shut off the MAGNATRAC at this time. Keep
your MAGNATRAC brake lever disengaged at
this time.
Carriage Bolt
ENGAGED
Brake Lever