Ariens 915001, Service Manual

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DRIVE TRAIN 915 EZRIDER SERVICE MANUAL
5.12
TRANSAXLE REPLACEMENT
1 . Mount the Eaton transmission into the transaxle
subframe and mount with hardware removed earlier.
Connect hoses and fill with oil. Let air breath out of
line before tightening hose clamps.
2. Place the transaxle subframe with transaxles under
the frame of the unit.
3. Raise and support the transaxle assembly inside of
the frame and secure to the frame with the carriage
bolts and nuts removed earlier.
4. Attach the hydraulic lines to the expansion tank,
release the hose clamps stopping the oil flow.
5. Install the main drive belt and check belt routing for
proper clearance on the top of the transaxles,
reattach the drive belt idler tension springs.
6. Check for proper belt tension before proceeding and
recheck belt routing.
7. Refill the transaxle oil expansion tank prior to
bleeding air from the transaxle.
8. Verify that transmission lines and elbows are sloping
upward toward the expansion tank. Remove straps
holding hoses down if required.
5.13
TRANSAXLE AIR BLEEDING
Use the air bleeding procedure when unit has a loss of
drive or ground speed.
This condition is caused by trapped air in the hydraulic
system. If the air is not removed from the system; the
drive will get progressively worse.
To bleed the transaxle:
1. Verify that the transmission belt is not slipping.
2. Verify that the control arms going to the transmissions
are adjusted properly.
3. Place jackstands under the rear of the unit frame to
support the unit with the drive wheel off the ground.
4. Check fluid level in the expansion tank, fill with Mobil
DTE-26 oil or a detergent 30W oil.
5. Verify that the parking brake arm is centered to
release the brake.
6. If the transmission operates irregularly the
transmission needs to be bled.
7. Verify that the transmission lines and elbows are
sloping upward toward the expansion tank. Remove
straps holding the hoses down.
8. Remove the side panels and loosen control stops on
both sides of the cam arm. This will allow the
transmission control arm to move through the full
motion of the transmission.
9. Cycle the unit from the full forward position to the full
reverse position every 15 seconds for three minutes.
10. Verify the fluid level in the expansion tank.
11. If the transmission fluid level drops, add fluid. If the
performance of the transmission improves, repeat
bleeding procedures until no more fluid is needed to
be added to the expansion tank.
12. Replace the transmission if no improvement is noted.
Transaxles full forward speed should be 110 - 120 rpm at
the axle shaft.
5.14 HYDROGEAR FLUID RECOMMENDATIONS
The fluids used in Hydro-gear transaxles have been
carefully selected, and only equivalent or better products
should be used.
Typically, an engine oil with a minimum rating of 55 sus
at 210 ° F and an API classification of SH/CD is
recommended. A 20W-50 engine oil has been selected
for use by the factory.
The grease used in the manufacture of Hydro-Gear
products is a STENS Premium grease and should be
substituted for with equivalent products only if it is not
readily available in your area.
NOTE: This grease is not compatible with all grease
types.
Hydrogear transaxle
5-29 Ariens® 01546200 Orig. 9/98
915 EZRIDER SERVICE MANUAL DRIVE TRAIN
5.15
HYDROGEAR REPAIR (MINOR)
Minor repairs may be performed, following the
procedures in this section.
Cleanliness is a primary means of assuring satisfactory
life of either new or repaired units. Cleaning parts by
using 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 of
the transaxle should be cleaned before beginning any
repairs.
Shaft Seals
Lip type seals are used on the pump input shaft, the
displacement control shaft and bypass actuator shaft of
the transaxle. These seals can be replaced without major
disassembly of the unit. Replacement of these seals will
require removal of the transaxle from the machine frame.
To remove the input shaft seal carefully pull the seal out
of the housing bore with a "hook" type tool or a slide
hammer type puller. Care must be taken to avoid
damage to the housing bore or to the shaft sealing
surface.
Lubricate the new seal prior to installation with a
petroleum jelly.
Wrap the shaft spline with a thin plastic or cellophane
tape to prevent damage to the new seal lip during
installation.
Slide the seal over the shaft and press it into the housing
bore. Be careful not to damage the seal. The seal should
seat against the retaining ring.
The displacement control shaft seal and bypass actuator
5.16
HYDROGEAR REPAIR (MAJOR)
1 . 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.
2. Position and secure the IHT with the upper housing
down to allow access to the ten housing assembly
cap screws.
3. Remove the eight rear housing assembly cap screws.
4. Remove the ten bottom cover assembly screws.
5. Remove the toques head cap screw holding the
brake arm to the transaxle case.
6. Remove the bottom and rear covers from the
transaxle.
NOTE: The sealant will make the covers difficult to
remove.
7. All components should remain in the upper housing
(positioned down).
shaft seal may be replaced following similar procedures.
8. Remove the brake gear from the brake shaft.
Seals
5-30
9. Remove the oil seals from the brakes shaft. Push out
the brake shaft to remove the support bearing.
NOTE: Prior to reassembly the lower and rear covers
must be thoroughly cleaned and old sealant must be
removed.
NOTE: The lip seals must not be re-used during
reassembly.
10. Inspect the final drive gear teeth for excessive wear
or damage.
Ariens® 01546200 Orig. 9/98