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Correct oil volume is determined by characters 7 and 13 of the
model number. (Z*-****-X***-***X*)
SERVICE SECTION
SECTION 11:
HYDROSTATIC SYSTEM
SERVICE AND MAINTENANCE
External Maintenance
Regular external maintenance of the transaxle should include the following:
1.
Check the vehicle operator's manual for the recommended load ratings. Insure that the current application
does not exceed load rating.
2.
Check oil level in accordance with "Fluid Change Procedure," step 12.
3.
Inspect the vehicle drive belt, idler pulley(s), and idler spring(s). Insure that no belt slippage can occur.
Slippage can cause low input speed to the transaxle.
4.
Inspect the vehicle control linkage to the directional control arm on the transaxle. Also insure that the control
arm is securely fastened to the trunnion arm of the transaxle.
5.
Inspect the bypass mechanism on the transaxle and the vehicle linkage to insure that both actuate and
release fully.
Service and Maintenance Procedures
Some of the service procedures presented on the following pages can be performed while the transaxle is
mounted on the vehicle. Any repair procedures as mentioned in the repair section of this manual must be
performed after the unit has been removed from the vehicle.
1.
Use of components for purpose of repair other than Genuine Hydro-Gear parts must be pre authorized in
writing by Hydro-Gear to be eligible for warranty consideration. Use of non-genuine Hydro- Gear parts could
damage the product or cause it to not operate properly or fail prematurely.
2.
Repairs or installation by personnel other than as authorized by Hydro-Gear must be pre authorized by
Hydro-Gear in writing to be eligible for warranty consideration.
3.
Hydro-Gear does not provide warranty coverage for defects or damages caused by the use of unauthorized
parts or service.
Fluids
The fluids used in Hydro-Gear products have been carefully selected, and only equivalent, or better products
should be substituted.
Typically, an engine oil with a minimum rating of 9.0 cSt (55 SUS) at 230° F (110° C) and an API classification
of SL is recommended. A 20W50 engine oil has been selected for use by the factory and is recommended for
normal operating procedures.
"All fluids should be handled and disposed of according to local, state, and federal regulations.”
Fluid Volume and Level
Fluid volume information is provided in the table
below. Total system volume will depend on expansion
tank size, hose length and transaxle volume.
Certain situations may require additional fluid to be
added or even replaced.
Purging will be required if oil has been changed.
Refer to the purging procedures.
Note:
The oil volume figure shown does not include what is in the expansion
tank hose or the expansion tank. That will have to be determined by the
machine manufacturer/ end user due to varying hose sizes/lengths and
expansion tank sizes.
CHAR 7
CHAR 13
Oil Volume
3,4,5,6
7,8,A,E
L,R,X
70.3 oz - 2079 ml
9,8,D,K
S,T,U,W
L,R,X
71.9 oz - 2126 ml
T
56.6 oz - 1496 ml
20W50 engine oil
Fluid Description
ZT-2800/ZT-3100/ZT-3200/ZT-3400
