Loosen, but do NOT remove, the hex nut found on the right side of the brake assembly. See Figure 12.

Using a feeler gauge, set the gap between the brake disc and the brake puck at .011".

Re-tighten the hex nut loosened earlier.

Hex Nut

Set Gap at .011"

Brake Disc

Compression

 

 

Spring

NOTE: View shown from beneath tractor. Transmission

Figure 12

SECTION 10: MAINTENANCE

WARNING: Disconnect the spark plug wire(s) and ground against the engine before performing any maintenance.

ENGINE

Refer to the separate engine manual for engine maintenance instructions.

Check engine oil level before each use as instructed in the separate engine manual packed with your unit. Read and follow instructions carefully.

Changing Engine Oil

Unscrew oil fill cap and remove dipstick from the oil fill tube. See Figure 13.

Oil Fill Cap

Protective Cap

 

 

Oil Drain Hose

 

 

 

 

Oil Fill Tube

 

Oil Drain Valve

 

 

 

 

 

 

 

Oil Drain Port

NOTE: Single-cylinder engine shown.

Valve location will vary with engine style.

Figure 13

Pop open the protective cap on the end of the oil drain valve to expose the oil drain port. See Figure 13.

Push oil drain hose (packed with unit) onto the oil drain port. Route the opposite end of the hose into an appropriate oil collection container with a capacity great enough to collect the used oil.

Push the oil drain valve in slightly, then rotate counterclockwise and pull outward to begin draining oil. See Figure 13.

Service the oil filter (if so equipped) as instructed in the separate engine manual

packed with your unit.

Perform the above steps in the opposite order after oil has finished draining.

Refill the engine with new motor oil.

IMPORTANT: Refill the engine with the proper capacity and weight of motor oil as instructed in the separate engine manual.

Service air cleaner every 25 hours under normal conditions. Clean every few hours under extremely dusty condition. To service the air cleaner, refer to the separate engine manual packed with your unit.

The spark plug(s) should be cleaned and the gap reset once a season. Spark plug replacement is recommended at the start of each mowing season; check engine manual for correct plug type and gap specifications.

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MTD 604 manual Maintenance, Changing Engine Oil