Service Manual

26 ZT-2200 (EZT
®
)
Refer to Figures 16-25.
Disassembly
1. Remove the bypass arm and control arm.
See page 18.
2. Drain the oil from the transaxle. See page
11.
3. Remove the side cover. See page 22.
4. Remove the reduction gears. See page
23.
5. Remove the motor shaft. See page 24.
6. Remove the input shaft and bypass rod. See
page 25.
7. (See Figure 16) Remove the swashplate
(19) and pump cylinder block (4) as one
assembly. NOTE: Removal will be aided by
applying a small amount of pressure on the
trunnion mounted swashplate towards the
center section. Also note that the control arm
(23, page 18) may be loosely assembled at
this point to assist in swashplate removal.
While gently removing the swashplate and
block assembly, keep the block face ush
with the center section to minimize damage
to the running surface.
8. (See Figure 17) Disassemble the pump cyl-
inder block (4) from the swashplate (19).
9. (See Figure 18) Check each piston for
proper operation by pressing the pistons in
and releasing them in the block bore. Dis-
assemble the pump cylinder block. Check
for piston/block wear in the cylinder bore.
Inspect the pistons (A), piston springs (C)
and thrust washers (B) for excessive wear
or damage. NOTE: Thrust washers may be
held in place in the piston by residual oil.
10. Reassemble the pistons, springs and wash-
ers into the cylinder block and set aside.
11. (See Figure 19) Remove the thrust bearing
assembly (35) from the swashplate (19).
(Center Section/Filter)
12. (See Figure 20) Remove the center sec-
tion mounting screws (12). NOTE: The
center section is under motor block piston
spring pressure. These screws are factory
installed to 700 lb-in (80 Nm) and use an
anaerobic thread adhesive. A breaker bar
will be required at this step. Clean the in-
ternal threads of the mounting holes with
compressed air.
13. Remove the center section and lter as-
sembly (57, Figure 21). NOTE: Bypass
plate (Figure 22) may slide out of the center
section.
14. Remove the lter cover by pressing in and
down on the lter cover tabs. Discard the
cover.
15. Note the location of both check plugs (56)
before removal for correct replacement
during reassembly. Remove and inspect
the check plug assemblies (56) for debris
or damage.
16. Remove the lter base (61) and discard it.
NOTE: The lter base is included in the lter
kit to be installed during reassembly of the
unit.
(Motor Block)
17. (See Figure 23) Remove the motor cylinder
block assembly (6) from the housing (1).
18. Disassemble the motor cylinder block as-
sembly (4). Check each piston for proper
operation by pressing the pistons in and
releasing them in the block bore. Disas-
semble the motor cylinder block. Check
for piston/block wear in the cylinder bore.
Inspect the pistons, piston springs and
thrust washers for excessive wear or dam-
age. NOTE: Thrust washers may be held
in place in the piston by residual oil.
HYDRAULIC COMPONENTS