1. Riding Lawn Mower Service Manual
2. Craftsman Riding Lawn Mower Service Manual
3. Troy-bilt Riding Lawn Mower Service Manual

Service Mower OMM142698 Issue I0 Lawn Tractors LT133, LT155 and LT166 PIN (125001 - ) Copyright© Deere & Company Service Mower Removing Mower 1. Park vehicle safely. (See Parking Safely in Safety Section.) Allow engine and muffler to cool completely. C CAUTION: Avoid injury! Rotating blades are dangerous. Before adjusting or servicing mower: Disconnect spark plug wire(s) to prevent engine from starting accidently. Always wear gloves when handling mower blades or working near blades.

Adjust mower cutting height to 25 mm (1 in). Put wood blocks under each side of mower. C CAUTION: Avoid injury! Lift lever is spring-assisted and may have unexpected movement. Put the lift lever in the mowing position before removing or installing the mower.

Put lift lever in mowing position, bringing deck down onto blocks. Remove spring locking pin and drilled pin (I) from both rear draft arms (J) and mounting brackets. Move lift lever to the transport position to raise rear draft arms. Remove wood blocks from both sides and slide mower out from under the tractor.

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Installing Mower 1. Park vehicle safely. (See Parking Safely in Safety Section.) Allow engine and muffler to cool completely.

Check that mower cutting height knob is set at 25 mm (1 in). Put lift lever in transport position. C CAUTION: Avoid injury!

Rotating blades are dangerous. Before adjusting or servicing mower: Disconnect spark plug wire(s) to prevent engine from starting accidently. Always wear gloves when handling mower blades or working near blades. Slide mower under the tractor. Put wood blocks under each side of mower deck.

Riding Lawn Mower Service Manual

C CAUTION: Avoid injury! Lift lever is spring-assisted and may have unexpected movement.

Put the lift lever in the mowing position before removing or installing the mower. MIF M88502 15. Check to see if adjustment pin (P) lines up with mower engagement arm hole (O). If pin does not line up, loosen lock nut (Q) and turn pin until pin slips freely into hole.

Tighten lock nut. Fasten adjustment pin (P) to mower arm with washer and spring locking pin (M). Replacing Mower Drive Belt (38-Inch Mower) NOTE: In this procedure the mower deck is removed for easier access. However, it is NOT necessary to remove deck when replacing belt. Park tractor safely. Allow engine and muffler to cool completely.

Remove mower if desired. Remove self-tapping cap screws (C). Move brake assembly (B) away from sheave (A) and drive belt. Loosen idler (D) and tensioning idler (E) just enough to slip belt past the guides.

Craftsman Riding Lawn Mower Service Manual

Remove drive belt and clean top of mower. Install new belt on mower deck as shown. Tighten idler (D) and tensioning idler (E). Align brake assembly (B) with right spindle sheave (A) and fasten with self-tapping cap screws (C). Brake pad must seat against top of sheave. Install mower and adjust mower engagement rod, if necessary. Adjusting Mower Timing Belt Tension (Freedom42) 1.

Park machine safely. Move lift lever to mowing position and move to left side of mower. NOTE: Mower timing belt cover can be unfastened and flipped open on the left side, exposing the tension adjustment mechanism, without having to remove the mower or the timing belt cover.

IMPORTANT: Avoid damage! Incorrect belt tensioning can cause belt damage. Do not over tighten belt tensioning spring assembly. Loosen jam nut (D) and adjusting nut (E) so that there is a small air gap between washer (F) and mating surface of spring bushing (G).

Rotate adjusting nut (E) clockwise until washer (F) makes solid contact with the mating surface of spring bushing (G). Tighten idler assembly center nut (B) to 87 Nm (64 lb-ft.). Tighten jam nut (D) against adjusting nut (E) to 27 Nm (20 lb-ft.).

Turn left spindle sprocket (C) to be sure belt is seated properly in the sprockets and idlers. NOTE: The position of the drain holes in the spindle sheave (A) and the indentations in the timing sprocket (M) are in alignment with the mower blades (K) and (L). IMPORTANT: Avoid damage! Damage may occur to the belt or blades after a major blade impact: Check blades for damage and timing.

Troy-bilt Riding Lawn Mower Service Manual

Check the timing belt for damage and proper tensioning. Park machine safely.

(See Parking Safely in the Safety Section.) Allow engine and muffler to cool completely. Remove mower. Remove mower drive belt. C CAUTION: Avoid injury!

Mower blades are sharp. Always wear gloves when handling mower blades or working near blades. Check blade bolt torque anytime mower is removed. Carefully hold blade with glove, use a hand torque wrench, and tighten bolt to 57 Nm 42 lb-ft.).

Install tensioning spring assembly and adjust timing belt tension: a. Align notch (Q) in idler assembly with tab on spring bushing (S). Rotate adjusting nut (F) clockwise until the washer (R) makes solid contact with the surface of the spring bushing (S). Turn adjusting nut an additional 1/2 turn to allow for new belt stretch. DO NOT over tighten.

Rotate right spindle sheave clockwise and observe that belt is riding properly in sprockets and idlers. Tighten jam nut (E) against adjusting nut. AMA103062 4. Loosen sheaves (B) and (C). Remove mower belt. Clean top of mower deck and sheaves.

Inspect belt for wear or damage; replace as necessary. Install belt on mower deck as shown. Tighten sheaves. Install belt shields and fasten with six cap screws.

Install mower deck and adjust mower engagement rod, if necessary. Move lift lever to transport position. Adjusting Spindle Brakes NOTE: This procedure applies only to the 38-Inch and 48C mowers. The Freedom42 mower has a self-adjusting spindle brake assembly - no adjustment is necessary. C CAUTION: Avoid injury!

Rotating blades are dangerous. Mower blades must stop within 5 seconds after mower is turned off.

Check spindle brake measurement every 25 hours or once a year (whichever comes first). Park tractor safely. Adjust mower cutting height to 25 mm (1 in.). Put lift lever in the mowing position. Push mower engagement lever forward. Remove belt shields.

Sears service repair. Put lift lever in mowing position. Measure distance between blade tip and flat ground surface. Measure distance between other blade tip and flat ground surface. Install new blade, if the difference between the two measurements is more than 3 mm (1/8 in). Servicing Mower Blades (38-Inch Deck) c CAUTION: Avoid injury! Mower blades are sharp.

Always wear gloves when handling mower blades or working near blades. Removing Mower Blades 1. Raise mower deck to gain access to mower blades. If necessary, remove mower deck after allowing engine and muffler to cool completely.

Block mower blade with a piece of wood to prevent it from spinning. Position mower blade (D) with the cutting edge towards the ground onto the mower spindle.

Install blade washer (C) with cup side toward the blade. Install hardened washer (B). Install and hand tighten cap screw (A) until mower blade is in full contact (fully seated) with spindle. Block mower blade with a piece of wood to prevent spinning and tighten cap screws to 53 Nm (39 lb-ft.). Servicing Mower Blades (Freedom42) c CAUTION: Avoid injury! Mower blades are sharp. Always wear gloves when handling mower blades or working near blades.

Removing Mower Blades 1. Hold mower blade with glove to prevent mower blades from spinning. Raise mower deck to gain access to mower blades. If necessary, remove mower deck. IMPORTANT: Avoid damage!

Improperly installed blades can loosen during operation. Do not lubricate or use power tools when installing the blade bolt or the bolt will be ineffective. Use a hand torque wrench and tighten bolts to blade bolt torque of: 57 Nm (42 lb-ft.) 3. Install and hand tighten bolt with washer (A) until mower blade is in full contact (fully seated) with spindle.

Hold mower blade with glove to prevent spinning, tighten bolts to 57 Nm (42 lb-ft.). Check mower deck timing and adjust if necessary.

Servicing Mower Blades (48C Deck) c CAUTION: Avoid injury! Mower blades are sharp. Always wear gloves when handling mower blades or working near blades. Removing Mower Blades 1. Raise mower deck to gain access to mower blades. If necessary, remove mower deck. Block mower blade with a piece of wood to prevent it from spinning.

Check that deflector cup (D) is in place between spindle and blade. Position mower blade (C) with the cutting edge towards the ground onto the mower spindle. Install blade washer (B) with cup side toward the blade. Install and hand tighten bolt (A) until mower blade is in full contact (fully seated) with spindle.

Block mower blade with a piece of wood to prevent spinning and tighten cap screw to 68 Nm (50 lb-ft.). Sharpening Blades c CAUTION: Avoid injury! Mower blades are dangerous! Always wear gloves while working on blades. Always wear safety eye protection when grinding. Sharpen blades with grinder, hand file, or electric blade sharpener.