MEDIUM TUBE GENERAL (Continued) FRAME TRACTORS Page 1‐3 Rev. 1/76 SPECIFICATIONS ENGINE Manufacturer ............ TECUMSEH Model/Spec ............ HH‐100‐115181 D .......... Model 1055 (G‐10) HH‐120‐120061 B ........... M odel 1220 (193) HH‐120‐120199 E .......... Model 1255 (G‐12) HH‐120‐120090 C .......... Model 1253 & 1257 HH‐140‐160001 ............ Model 1453 (G‐14) HH‐140‐160001 ............ Model 1456 (H‐14) HH‐150‐170001 ............... Model 1556 HH‐160‐170005 ............ Model 1656 (H‐16) Type .............. All Models ........ Horz. shaft, air cooled, 1 cyl, 4 cycle Bore and Stroke ........... HH‐100 & HH‐140 ............ 3‐5/16 x 2‐3/4 HH‐120, HH‐150 & HH‐160 .......... 3‐1/2 x 2‐7/8 ...
MEDIUM TUBE GENERAL (Continued) FRAME TRACTORS Page 1‐7 9/74 MAINTENANCE CHART Length of Type of MAINTENANCE REQUIRED Operation Maintenance Engine Cooling Air Screen ‐ Daily or Brush Clean 8 Hrs. * Engine Air Cleaner ‐ Shake out dirt – dry type Daily or 8 Hrs.* Wash – “OIL FOAM”® When no longer Replace serviceable Cooling Fins – (Engine) ‐ Daily or Clean – Use 8 Hrs. Air Hose If Available Spark Plugs ‐ 100 Hrs. Service or Replace Breaker Points – (Battery Ignition) ‐ 100 Hrs.* Service or Replace Ignition Timing – (Battery Ignition) ‐ 100 Hrs.* ...
GUNS could cause damage to the fittings and bearing seals. The proper hand grease gun can be purchased from your Bolens dealer. Ask for Bolens Grease Gun with Bolens Grease. Lubricate all linkages, levers and pins not equipped with grease fittings with an oil can once a week, or more ...
MEDIUM TUBE GROUP II. ELECTRICAL SYSTEM FRAME TRACTORS Page 2‐1 Rev. 5/77 TROUBLESHOOTING GUIDE ELECTRIC START MODELS PROBLEM PROBABLE CAUSE REMEDY Starter Motor does not energize. 1. P.T.O. engaged. 1. Disengage P.T.O. 2. Brake pedal not depressed or on 2. Depress brake pedal and lock, 1225 transmission, not locked. or lock transmission. 3. Corroded or loose electrical 3. Clean and tighten. connections. 4. Discharged battery. 4. Locate problem and recharge. 5. P.T.O. Interlock, brake interlock, 5. Check and replace if necessary. seat interlock. Transmission interlock, ignition switch, not functioning. ...
MEDIUM TUBE FRAME TRACTORS ELECTRICAL SYSTEM (Continued) Page 2‐17 9/74 DELCO‐REMY GENERATORS USED ON BOLENS TRACTORS 8. Field Coil Assembly 15. Insulated Stud Washer...
MEDIUM TUBE ELECTRICAL SYSTEM (Continued) FRAME TRACTORS Page 2‐18 9/74 TESTING ELECTRICAL SYSTEM TESTING IGNITION SWITCH Test the ignition switch for con‐ tinuity using a volt/ohm meter or continuity light. TESTING SOLENOIDS To test the solenoid connect the solenoid bracket to the neg‐ ative battery terminal and a jump‐ er ...
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MEDIUM TUBE FRAME TRACTORS ELECTRICAL SYSTEM (Continued) Page 2‐19 9/74 TESTING ELECTRICAL SYSTEM TESTING BATTERY CHECKING SPECIFIC GRAVITY To determine whether the bat‐ tery is capable of meeting the ...
MEDIUM TUBE GROUP III: DRIVE TRAIN FRAME TRACTORS Page 3‐1 9/74 TROUBLE SHOOTING GUIDE PROBLEM PROBABLE CAUSE REMEDY No forward or reverse with 1. Broken drive belt(s) 1. Replace belt(s) engine running 2. Drive belt(s) off engine or trans‐ 2. Reinstall belt(s) – replace belt(s) mission drive line if badly worn – check belt guides 3. Drive idler spring broken 3. Replace spring (gear models) 4. Free wheeling pin out of axle hub 4. Reinstall pin and secure with spring cotter ...
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MEDIUM TUBE DRIVE TRAIN (Continued) FRAME TRACTORS Page 3‐3 9/74 TRANSMISSION TOOLS OIL SEAL 1718432 ‐ Sleeve and Driver for 1891820 Seal – 3 & 6 Speed Worm Shaft 1718433 1718434 ‐ Sleeve and Driver for 1185352 – 3 Speed Input Shaft 1718435 1718436 ‐ Sleeve and Driver for 1185633 – 6 Speed Input Shaft 1718437 1718438 ‐ Sleeve and Driver for 1185205 Seal – 3 Speed Axle Shaft 1718439 Note: Driver 1718439 can also be used to install Right Hand axle bushing for axle # 1720256 1817440 ‐ Adaptor Driver with 1718439 Driver for 1185426 Seal – 3 Speed Limited Slip Oil Seal ...
MEDIUM TUBE DRIVE TRAIN (Continued) FRAME TRACTORS Page 3‐5 9/74 BEARING INSTALLATION 1. Use an arbour press, as illus‐ 3. Place the stamped end of the 4. Leave the grease on the outside trated, or similar method Bearing against the shoulder of Bearing. Do not wipe them. where possible. of ...
MEDIUM TUBE FRAME TRACTORS DRIVE TRAIN (Continued) Page 3‐6 9/74 OIL SEAL INSTALLATION 1. Be sure housing bore diameter, 10. When shaft is assembled from the spline, keyway or holes bore depth and shaft diameter reverse side of sealing lip, no should be rounded and lubri‐ are correct and within the re‐ special ...
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MEDIUM TUBE FRAME TRACTORS DRIVE TRAIN (Continued) Page 3‐8 9/74 TRANSMISSION ASSEMBLY PROCEDURE (3 SPEED) 1. REVERSE IDLER: Liberally grease, then install O‐Ring (1) into groove on Shaft (2). Insert Bronze Bearing (3) into Idler Gear (4). Position Idler Gear (4) (CHAMFERED TOOTH SEC‐ TION TOWARD FRONT) with a ...
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MEDIUM TUBE DRIVE TRAIN (Continued) FRAME TRACTORS Page 3‐9 9/74 TRANSMISSION ASSEMBLY PROCEDURE (3 SPEED) 4. WORMSHAFT: Insert splined end of Worm Shaft (32) through Bearing bore. Slip Roller Bearing Cone (33) over front end of Shaft (after Shaft tip has cleared Worm Wheel). Then push Worm ...
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MEDIUM TUBE DRIVE TRAIN (Continued) FRAME TRACTORS Page 3‐11 9/74 TRANSMISSION ASSEMBLY PROCEDURE (3 SPEED) 6. SHIFTER RAIL: The Shift Rail Interlock System as employed consists of two 1/4” Balls (78), a Compression Spring (79) and a small Shaft or Plug (80) accu‐ rately controlled in length (.300 ...
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MEDIUM TUBE DRIVE TRAIN (Continued) FRAME TRACTORS Page 3‐13 9/74 TRANSMISSION ASSEMBLY PROCEDURE (6 SPEED) 1. REVERSE IDLER: Liberally grease, then install O‐Ring (1) into groove on Shaft (2). Insert Bronze Bearing (3) into Idler Gear (4). Position Idler Gear (4) (CHAMFERED TOOTH SEC‐ TION TOWARD FRONT) with a Thrust Washer (5) on each side into cavity of Gear Case. Insert ...
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MEDIUM TUBE FRAME TRACTORS DRIVE TRAIN (Continued) Page 3‐14 9/74 TRANSMISSION ASSEMBLY PROCEDURE (6 SPEED) 1. AXLE SHAFT: Install Bearing Cup (30) into Gear Case divider wall (THIS STEP IS MORE DIFFICULT AFTER WORM WHEEL HAS BEEN IN‐...
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MEDIUM TUBE DRIVE TRAIN (Continued) FRAME TRACTORS Page 3‐15 9/74 TRANSMISSION ASSEMBLY PROCEDURE (6 SPEED) 5. WORMSHAFT: Insert splined end of Worm Shaft (54) through Bearing bore. Slip Roller Bearing Cone (55) over front end of Shaft (after Shaft tip has cleared Worm Wheel), then push Worm Shaft through Gear Case Divi‐ der Wall. As splined end of Worm Shaft protrudes into Transmission ...
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MEDIUM TUBE FRAME TRACTORS DRIVE TRAIN (Continued) Page 3‐16 9/74 TRANSMISSION ASSEMBLY PROCEDURE (6 SPEED) 6. WORM WHEEL CENTERING: wheel remove worm shaft and use ance ...
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MEDIUM TUBE DRIVE TRAIN (Continued) FRAME TRACTORS Page 3‐17 9/74 TRANSMISSION ASSEMBLY PROCEDURE (6 SPEED) 5. SHIFTER RAIL: The Shift Rail Install the range‐change Shifter NOTE: MANUALLY SPIN IN‐ Interlock System as employed Rail (89) following same lubr‐ PUT SHAFT TO RECHECK consist of two 1/4” Balls (78), a ication ...
MEDIUM TUBE DRIVE TRAIN (Continued) FRAME TRACTORS Page 3‐27 9/74 HYDROSTATIC REMOVAL AND INSTALLATION REMOVAL OF HYDROSTATIC PACKAGE FROM TRANSAXLE 1. Remove the filter tube from the Hydrostatic Package and block ends. 2. Remove linkage from bottom of Hydrostatic Package. 3. Remove the four (4) 12 point bolts that hold the Hydrostatic Package ...
MEDIUM TUBE DRIVE TRAIN (Continued) FRAME TRACTORS Page 3‐29 9/74 MODEL “10” HYDROSTATIC REPAIR To remove, use a 1” six point screws and the plated capscrew. in position with snap ring, Item socket turning clockwise as the Remove the charge pump body. (10), ...
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MEDIUM TUBE DRIVE TRAIN (Continued) FRAME TRACTORS Page 3‐31 9/74 HYDROSTATIC TRANSAXLE ASSEMBLY Install bearings (1) into gear case outside of the cover. Install bearing pounds. Install seal (33) onto housing (2). Be sure the bearing (26), and dowel pins (27) into pinion shaft (9) and in gear case is ...
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