TECUMSEH & PEERLESS
TRANSMISSION and DRIVE PRODUCTS
TECHNICIAN'S HANDBOOK
This manual covers all Tecumseh Peerless® gear products as follows:
100 Series Differentials
MST200 Series Transaxles
300 Series Transaxles
600 Series Transaxles
601 Slow Speed Transaxle
700 Series Transmissions
700H Series Transmissions
800/801 Series Transaxles
820 Series Transmissions
900 Series Transaxles
910 Series Transaxles
915/940 Series Transaxles
920 Series Transaxles
930 Series Transaxles
1000/1100 Series Right Angle/T-Drives
1200 Series Transaxles
1300 Series Transaxles
2300 Series Transaxles
2400 Series Transaxles
2500 Series Transaxles
2600 Series Transaxles
VST Transaxles
CONTENTS
Page
CHAPTER 1
Model Overview and Terms Used
Manufactured since 1945, Tecumseh/Peerless gear products are found in many products worldwide. Applications vary from industrial products to residential and commercial lawn and garden equipment. This book is intended for use by properly trained technicians that have appropriate facilities and the proper tools. If you are not a Tecumseh trained technician, DO NOT attempt a repair. Consult an Authorized Tecumseh Servicing Dealer.
Lubrication Chart
Check the Transmissions unit model and specification number before filling with lubricant. There may be a difference in the quantity recommended. This is dictated by the design of the vehicle and position of the transmission unit installed.
Torque Values Chart
Identification
Trouble Shooting Table
THE FIRST RULE IN TRANSAXLE TROUBLE SHOOTING IS TO ISOLATE THE PROBLEM TO THE TRANSAXLE. THE TECHNICIAN MUST CHECK FOR PROPER ADJUSTMENT OF THE BELTS, BRAKE, CLUTCH, SHIFTER AND LINKAGES. THE PULLEYS NEED TO BE CHECKED FOR SHEARED RETAINERS AND PROPER BELT DISENGAGEMENT. IF THE PROBLEM IS RELATED TO SHIFTING DIFFICULTIES, REMOVE THE DRIVE BELT AND RECHECK THE SHIFTING TO ASSURE THE PROBLEM IS NOT WITH THE ASSOCIATED EQUIPMENT.
With the engine off, shift through the gear sequence. Only light resistance should be felt. If the unit shifts hard the problem is in the transaxle. Otherwise, check the following areas: the clutch adjustment, brake adjustment, belt release and the belt guide positioning.
All current gear drive units are in-line shift and use shift keys to engage the desired gear to lock and then rotate with the shaft. This type of unit requires the transaxle or transmission to be in a no load condition (the clutch engaged) when gear selection occurs. Depressing the clutch pedal and therefore engaging the clutch, allows the unit to have the input and brake forces removed from the gears and shift keys, which allows the unit to shift freely and easily. Improper shifting (shifting while on an incline, shifting while towing any type of load, or shifting without clutch engagement) forces the shift keys to engage into a gear that is in a loaded condition. Improper shifting leads to premature wear and failure of the shift keys and drive gears and is considered abuse. Tecumseh's limited warranty covers only transaxle or transmission failures that are the result of a defect in the material or workmanship of the unit, not failures caused by normal wear or abuse by the operator.
Some Original Equipment Manufacturers (OEM)'s use Tecumseh transaxles and transmissions in lawn tractors that do not use a foot operated clutch. These lawn tractors combine the clutch release mechanism with the hand operated gear shift lever. When the gear shift lever is moved through the shift gate from the gear engagement position toward the neutral position, the attached clutch linkage moves the idler pulley to release all input drive belt tension from the transaxle input pulley. With the drive belt tension released (clutch engaged), the transaxle is able to shift while on an incline or while towing any type of load. Remember, the Tecumseh Peerless limited warranty covers defects in the material or workmanship. It does not cover worn shift keys or gears caused by clutch/belt linkages not adjusted correctly
CHAPTER 2
300 Series Transaxles
The 301 series is a single speed transmission manufactured in various styles to meet customer application needs. The unit uses synthetic lubrication and is completely sealed for life and therefore not internally serviceable.
Only the external parts listed below in the illustration are available from your normal source of supply
CHAPTER 3
600 Series Transaxles
There are two types of 600 Series transaxles. One is the 600 standard series and the other is the 601-001, 002, 003, etc. slow speed series transaxle. This first section will deal with the standard 600 series. Please refer to the next section for information on 601 slow speed transaxle.
The 600 Series transaxle has an aluminum case and cover. The input shaft is on the top of the case to receive vertical shaft power from the engine. Some 600 series transaxles are equipped with an optional disc brake. Due to the many variations of equipment braking systems, adjustments and repair to these components and linkages are not considered warranty
601 Slow Speed Transaxle
The 601 slow speed series uses the same case and cover as the 600 series so the appearance is the same.
CHAPTER 4
The 700 Series in-line shift transmission is available in 2, 3, 4 or 5 speeds forward depending on equipment manufacturer’s specifications.
The two speed version is not covered here but can be disassembled and reassembled using the same information for the 700 described in this section.
700H Series Transmissions
The "H' pattern transmission described here is a 4-speed forward, 1 reverse unit.
The 700 "H" pattern transmission gear arrangement is similar to the in-line transmission except for the shift gate and an additional collar and spacer on the shifter/brake shaft. The countershaft also has an additional spacer.
CHAPTER 5
800/801 Series Transaxles
The 800/801 series transaxle is basically a combination of the 700 series transmission with a 600 series transaxle differential. The position of the input shaft varies with a particular model. Because of the option of the input shaft and gear positioning on either side of the bevel gear, the axle output will vary, which allows the O.E.M. the ability to rotate and reverse mount the transaxle. The model described in this section is a five speed forward, single reverse. The input shaft for this model is located to the left of the bevel gear.
820 Series Transaxles
The 820 series is similar to the 920 series transaxle in basic operation. It has up to 6 speeds forward and one reverse. The 820 series is a heavy duty unit which is suited for ground engaging attachments. The 820 features ball bearings, needle bearings and steel cut gears throughout.
CHAPTER 6
900 Series Transaxles
The 900 series is similar to the 800 series transaxle but has only up to 4 speed offerings forward and 1 reverse. The differential utilizes bearing blocks and is retained by the case and cover. This unit contains an aluminum tag at location A or B, showing the model number.
CHAPTER 7
The 910 series is available with 1 speed forward and 1 reverse.
CHAPTER 8
915 Series
The 915 series transaxle has a sculptured case, gear driven reverse and a unique power flow. The 915 series has 3, 4, 5 or 6 speeds forward and 1 speed reverse. The model pictured throughout this section utilizes an A input. Assembly variations for models with a B input or reverse input will be explained in the appropriate segment.
940 Series Transaxles
The 940 Series is identical to the 915 Series with the exception of 3 added bronze bushings. These bushings is located on the shifter brake shaft one opposite the brake rotor end. The other two are located on the spur gear shaft, one on each end.
CHAPTER 9
920 Series Transaxles
The 920 series transaxle is very similar to the 900 series. The 920 series is available in 5, 6, or 7 speeds forward and 1 speed reverse. The 7 speed transaxle is shown in this section of this manual.
CHAPTER 10
930 Series Transaxles
The 930 series transaxle is very similar to the 920 series. The 930 series is available in 3 through 7 speeds forward and 1 speed reverse. The model pictured throughout this section is the most popular type. There are models which operate in the opposite direction without changing the input location. Throughout this section an asterik (*) will direct the reader to the end of the section where the differences between these models are explained.
CHAPTER 11
MST200 Series Transaxles
The MST (Manual Shift Transaxle) 200 is a sealed unit which uses 16 oz. (473 ml) of 80W90 gear lube (part #730229B). The MST series is available with up to 6 speeds forward and one reverse. It has a contoured case and cover. Its unique gear design system uses the input gear to drive both the forward and reverse motion. It also eliminates the recess previously found on shifter brake shaft spur gears.
Thrust washers are used on all transaxles to protect stationary surfaces from rotating surfaces. To determine the location of the thrust washer, check its inside diameter and compare it to the outside diameter of the shaft. If the fit is loose, it is out of position. The flat washer used on the shifter shaft (brake end) must have a diameter large enough to stop the keys from going past the end of the gear slots.
Checking Oil Level
CHAPTER 12
1200 Series Three-Speed Transaxles
The 1200 series transaxle has three forward speeds and one reverse.
This series is not intended for use with ground engaging equipment. That is, it should not be used to pull plows, tillers or similar equipment. Care is to be used and common sense is expected in any situation where a severe strain will be placed on the axles.
CHAPTER 13
1300 Series Hydrostatic Gear Reduction Differentials
The 1300 series unit, is driven by a hydrostatic pump connected to the units case. The transmission function is accomplished by the hydrostatic controls. The Tecumseh/Peerless unit, therefore, only reduces input shaft speed to the differential and axle assembly.
CHAPTER 14
2300 Series Four-Speed Transaxles
The 2300 series transaxle is a four speed forward with one speed reverse transaxle.
CHAPTER 15
2400 Series Hydro Powered Transaxles
The 2400 Series transaxle is a gear reduction unit which is powered by a hydrostatic pump.
CHAPTER 16
2500 Series Hydro Powered Transaxles
Most 2500 Series two speed gear boxes are run by an Eaton® Model 10 hydrostatic unit. Power for the hydrostat is supplied by an engine with up to an 18 H.P. rating. The unit has infinite forward and reverse speeds in both a high and low range. The 2500 series are shipped without lubrication. Original equipment manufacturers fill each gear case with lubricant when installing the 2500 in the equipment. Lubrication for the 2500 is 7 to 8 pts. (3.3 - 3.8 Lt) of SAE Type A automatic transmission fluid.
CHAPTER 17
2600 Series Hydro Powered Transaxles
The 2600 series transaxle has infinite forward and reverse speeds. It is powered by a Sundstrand® hydrostatic drive connected to an engine with up to a 20 Horsepower rating. The 2600 series are shipped without lubrication from Tecumseh/Peerless. Original equipment manufacturers fill each gear case with lubricant when installing the 2600 in the equipment. Lubrication for the 2600 is 7 to 8 pts. (3.3 - 3.8 Lt) SAE Type A automatic transmission fluid.
CHAPTER 18
Differentials
The differential assemblies of Tecumseh/Peerless units are grouped together in this section. Though there is little similarity between the 100, 600, 800 and remaining series units, they are grouped here because their function is the same.
The differential assemblies for the 820, 1200, 1300, 2300 and 2400 series Peerless units are very similar. However, each must be assembled in its own way. By grouping them together, you will become more aware of differences in each unit.
CHAPTER 19
Drives
This chapter relates to service of all Right Angle and T-drives.
CHAPTER 20
1100 Series Drives
The 1100 series angle drive is a heavy duty gear box used with larger equipment with horse power ratings up to 20 H.P. This unit is of cast iron construction for strength featuring tapered roller bearings for longer life. It can be configured wither as a right angle drive with right or left handed rotation, or a “T” drive. Reassembly is the reverse of the disassembly procedure.
CHAPTER 21
Shifting Assembly
Shift Key Quick Reference Guide
CHAPTER 22
Bearing and Bushing Service
The ball bearings used in the outer ends of the axle supports are sealed. Without removing the bearings, but with the axle removed, rotate the inner race with your fingers. If any roughness is noted, replace the ball bearing assembly. These ball bearings are factory lubricated and additional lubrication cannot be added. When driving in these ball bearings, use the proper tool that drives on the outer race as shown on the next page.
When removing bushings, use the combined bushing remover and installation tool. Position the piece to be serviced on the table of an arbor press with an opening to allow the bushing to pass through.
CHAPTER 23
VST Troubleshooting
The information on the following pages has been provided to help understand the internal operation of the VST. Do not use this information to attempt any internal repairs. Tecumseh's current policy on hydrostatic transaxles that have internal failures is to replace the complete unit. This has not changed. However, we would like to provide a failure checklist to assist in making an accurate evaluation of the complete tractor to eliminate any unnecessary replacements. Here is a list of items to check and corrective actions to take.
To determine if the problem is with the hydro unit, all external problem possibilities must be eliminated.
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