HYDRO-GEAR 310-0500/0750 SERVICE MANUAL Table of Contents – Page 1 of 1 INTRODUCTION/GENERAL DESCRIPTION INTRODUCTION GENERAL DESCRIPTION MAINTENCE FLUIDS/GREASES SAFETY PRECAUTIONS MAINTENANCE TROUBLESHOOTING DIAGRAM 310-500/0750 IHT TROUBLESHOOTING DIAGRAM MINOR REPAIRS GENERAL INFORMATION SHAFT SEALS PARKING BRAKE CONTROL ARM & FRICTION PACK OIL LEVEL MAJOR REPAIRS GENERAL INFORMATION DISASSEMBLY PROCEDURES DISASSEMBLY PROCEDURES DISASSEMBLY PROCEDURES DISASSEMBLY PROCEDURES DISASSEMBLY PROCEDURES RECOND
Table of Contents Introduction.................................................................................................. General Description ..................................................................................... FIuids/Greases ............................................................................................. Safety Precautions ...................................................................................... Maintenance ..................................................
Introduction The purpose of this manual is to provide information The IHT has a self-contained fluid supply and an integral filter. The fluidis forced through the filter by a positive useful in servicing the Hydro-Gear Integrated Hydro"head" on the fluid in the housing/reservoir with an assist static Transaxle (IHT). This manual includes component as by the negative pressure created in the pump pistons description,troubleshooting,maintenanceandrepair they operate. procedures.
Fluids/Greases Maintenance The fluids usedin HYDRO-GEAR products have been Check the transaxle cooling fan for broken or distorted blades, and check to see that the fan is securely fascarefully selected, and only equivalent or better products tened. Replace thefan if damaged. should be used. Typically, an engine oil with a minimum rating 55 of SUS at 210 F and anAPI classification of SWCD is recommended. A2OW-50 engine oil has been selected use for by the factory.
OPERATES IN ONE DIRECTION ONLY FOR CHECK CHECK BELT CONTROL DRIVE OK ULLEY EXCESSIVE LINKAGE OK REPAIR OR I I I DEFECTIVE DEFECTIVE REPLACE OPERATINGIG HOT/ LOSING POWER LOW DEFECTIVE PROPERLEVEL DEFECTIVE I PROPERSETTING LINKAGE CONDITION FOR EXCESSIVE DRIVE BELT VEHICLE LOAD DEBRISBUILDUP DEFECTIVE DEFECTIVE * CHANGEOIL DEBRIS REPLACE VEHICLELOAD REPLACE TRANSAXLE NOISY UNDER LOAD LEVEL IN LINKAGE VALVE VEHICLELOAD HIGH DEFECTIVE I I ADJUST BYPASSVALVE LINKAGE FILL TO
WARNING!!! THE VEHICLE SHOULD BE ON LEVEL GROUND AND THE ENGINE DISABLED BEFORE PERFORMING ANY ADJUSTMENTS - SYMPTOM OPERATES IN ONE DIRECTION ONLY POSSIBLE CAUSE CORRECTIVE ACTION -Inspect control linkage -Inspect drive belt& pulleys -Repair or replace -Repair or replace - SYMPTOM NOISY POSSIBLE CAUSE CORRECTIVE ACTION -Check oil level& condition -Check for excessive loading -Check brake setting -Check for loose parts -Check bypass valve linkage operation -Fill to proper level or change oil -Redu
Minor Repairs General Information To remove the input shaft seal carefully pull the outseal Minor Repairs maybe performed, following the proce- of the housing bore with a “hook” type tool or a slide hammertype puller. Care be must takento avoid damage dures in this section, without voiding the unit warranty. to the housing bore or to the shaft sealing surface.
Parking Brake Control Arm & Friction Pack Thebrakewassetataspecificrunningclearance NOTE: The control arm and friction pack vary between (approximately 0.030") between the discs to the Original modelsand is notusedonsome.The OEM have Equipment Manufacturers specifications. Refer to the established individual specifications for the proper advehicle service manual for the correct clearance. justments. Refer to vehicle service manual for the proper procedures.
General Information Position and secure the IHT with the upper housing down Major Repairs described in the following sections are for to allow access to the twenty housing assembly cap screws. the complete disassembly and reassembly (MajorRepair) of the IHT and will all void product warranty, unless license to perform said Major Repair was previously obtained from an Authorized Representative of HydroGear. Cleanliness is a primary means of assuring satisfactory life on new or repaired units.
Disassembly Procedures All components should remain in the upper housing (positioned down). CAUTION: Theaxle/differentialassembly may stick as the lower housingis being lifted off of the upper NOTE: The lip seals must not be reused during reassembly. Inspect the bronze bearings for excessive wear. The bearings shouldbe 0.7535”to 0.7561' I.D.. housing. Inspectthe axle ends for damage or excessive wear. Inspect the lower housing for damage. Inspect the axle axle ends shouldbe 0.7486' to 0.7496".
Disassembly Procedures Using a9/16” socket (or box end) wrench, remove the in the Remove the brake rotors and stators by sliding aone three at assembly bolts retaining the center section upper housing. time off of the end of the splined motor shaft. CAUTION: Thepump andmotor piston springsmay push the center section assembly out of position while you remove thesebolts. Removal andInspection of Brake Rotors Inspect each side of both rotors for excessive wear or damage.
Disassembly Procedures For 310-0750 Models Only: Removethe two internal hex head cap screws retaining the jack shaft to the Remove the motor block assembly from the motor shaft and inspect for unusual wear or damage. The pistons housing with a 5mm hex wrench and remove the jack should fit with very little side clearance in the shaft block/ pinion bores,gear assembly from the housing. but must slide freely. NOTE: The correct bore diameter for the blockis0.6776 to 0.6784 and the pistons should be 0.
Disassembly Procedures Remove the pump input shaft assembly from the Remove the motor thrust bearing assembly, swashplate housing. kit and cradle bearings from the housing and inspect for unusual wear or damage. Inspect the shaft and bearing for unusual wear or damage. Swashplate Kit andThrust Bearing Assembly Pump Input Shaft Assembly Remove the slot guide block from the displacement control shaft. Reposition housing and remove thedisplacement control shaft and lip seal.
Assembly Procedures Be sure to toque all threaded parts to the recommended Repositiontheupperhousingandinstallthecradle toque levels. bearings. Replace all O-ringsand shaft seals. Install the slot guide block onto the displacement control shaft. CAUTION: Most parts have critical high tolerance surfaces. Care mustbe exercised to prevent damage Install the swashplate assembly into the housing. The to these surfaces during assembly.
Assembly Procedures Install the aligning pins and the bypass actuator into the housing. With the swashplate in the neutral (0 angle) position, lubricate the running surfaces and install the blockkit onto the pump input shaft. Make sure the splines engage properly. Install Aligning Pins and Bypass Actuator Install the washers and a new lip seal onto the motor shaft. Install Pump Block Kit Install the motor shaft into the center section.
Assembly Procedures Lubricate the running faces and install the motor kit block Insert the three assembly bolts into the center section onto the motor shaft. and press center section down onto the aligning pins and pump input shaft until seated on mounting bosses. While holding the center section in position,toque the bolts evenly from 525 in.lbs. to 700 in.lbs..
Assembly Procedures Fill the axle pockets of the upper housing with Rykon Fixture the lower housing and apply the sealant as shown Premium grease (inside of bearing location). NOTE:in the Thisfollowingtwo examples. grease is not compatible withall grease types. NOTE: The drawings below may not appear the same as Do not overfill, and wipe off any excess grease or sealantthefactorysealantapplication,butaretherecomwill not cure properly. mended patterns. Apply sparingly.
Assembly Procedures 120 to 185 in. Ibs.. Torque the nut on the brake bolt from Position the lower housing onto the upper housing and secure with assembly bolts.Toque the bolts from135 in.lbs to 165 in.lbs.followingthepatternsillustrated below. NOTE: The group of bolts around the front of the housings have the same sequence number because they are installed simultaneously at our factory, the order in which you torque them should not be important.
Assembly Procedures Prior to adding oil to the IHTit is recommended that you Check the oil level after fully purging the unit of air. It This may be performed with a small handshould be between1.75"and 2.0"from the top of the test for leaks. pump or by using compressed air and a regulator. housing Do not for the310-0500, and between1.25"and 1.62" from the top of the housing for31the 0-0750. allow more than 1 0PSIto beapplied or seal damage may occur.
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DESCRIPTION NO. DESCRIPTION NO. 1 LOWER HOUSING 49 RING-RETAINING 2 UPPER HOUSING 50 BOLT-DIFF LOCKING 1/16-24x2-1/4 3 SEAL-LIP 52 WASHER-3/4x1.5x.13 53 WIRE RETAINING RING 4 SEAL-.75x125x.250 6 RETAINING RING 5 54 0 RING-.103x2.987 ID SHAFT BALL BEARING 56 INPUT SHAFT CRADLE BEARING 7 58 BOLT 1/4-20x1.38 30x52x13 8 VARIABLE SWASHPLATE 9 13 PIN-.5 ODx.43 IDx.
62 ~ Page 22 310500107501HT
i! I 40 HEXLOCKNUT 5/16-24 SPACER 130 41 BRAKE ROTOR/STATORASSEMBLY VENT-BUSHING 131 43 WASHER - 7/16 x 7/8 x .060 132 METAL VENT 44 DIFFERENTIAL ASSEMBLY 134 SLOTTEDNUT 52 WASHER 3/4 x 1.5 x .13 135 COTTERPIN 53 SEAL-.75 X 1.25 X .
A World Leader in Turf Care Transmission Products Hydro-Gear isa leader in engineered products designed specifically for the turf care industry a wide range with of hydrostatic transaxles, transmissions and pumps. Hydro-Gear and its associate companies provide complete worldwide service parts, repair, and technical assistance. 210-1010s Transaxles 210-3010L Heavy Duty Bantam Duty Pumps Transaxles Bantam Duty Transmissions HYDRO-GEAR,1411 S.
