Service Manual
General
Information
Major Repairs described in the following sections are for
the complete disassembly and reassembly (Major
Re-
pair) of the IHT and will void all product warranty, unless
license to
perform
said Major Repair was previously
obtained from an Authorized Representative of Hydro-
Gear.
Cleanliness is a primary means of assuring satisfactory
life on new or repaired units. Cleaning parts by using a
solvent wash and air drying
is
usually adequate. As with
any precision equipment, all parts must
be
kept
free
of
foreign materials and chemicals.
Protect all exposed sealing surfaces and open cavities
from damage and foreign material. The outer surfaces
should
be
cleaned before beginning any repairs.
It
is recommended that all seals be replaced. Lightly
lubricate all seals with a clean petroleum jelly prior to
assembly.
It
is recommended that parts requiring replacement
be
replaced as a complete assembly
(kit)
as
shown
in the
service parts drawings on pages
20 -23.
Prior to perfomring Major Repairson the IHT, remove the
transaxle from its installed location and remove any
external components such as the brake arm, brake
actuating pins, control arm (and friction pack
if
included),
cooling fan and input pulley or frame mounting hardware.
NOTE:
Thoroughly clean all exposed surfaces prior to
any further disassembly.
Disassembly
Procedures
Drain the
oil
by removing the breather assembly and
positioning the IHT
so
that the breather port
is
down to
allow the oil to drain thoroughly.
Drain Oil
From
Breather
Port
Position and secure the IHT with the upper housing down
to allow access to the twenty housing assembly cap
screws.
Remove
Housing
Assembly
Bolts
Using the appropriate tool, remove the twenty assembly
screws.
NOTE:
Prior to October
27, 1993
a
3/16"
drive
internal hex head cap screw was used, at that time a
change was made to an
"E-8"
external drive
“Torx”
cap
screw.
Loosen the nut on the brake arm mounting bolt.
Separate the two housing halves by applying pressure
(as shown) with two large straight blade screw drivers.
Use caution to prevent damage to the mating sealing
surfaces as you separate the
two
halves.
NOTE:
The
sealant
will
make the
two
halves difficult to separate.
Separate
Housing
Halves
310-0500/07501HT
Page
9