MTD 690 through 699 manual Hydrostatic Transmission Cooling, Fuel Filter, Cleaning Engine & Deck

			• Remove the belt from the transmission pulley and
	Self-Tapping Screws		engine pulley, and remove from the unit.
			• Reassemble using a new belt, following
			instructions in reverse order.
			Engine	Center Bolt,
				Lock Washer &
			Pulley
				Flat Washer
Deck		Belt Cover	Self-Tapping
Pulley		Belt Cover	Screws

Drive

Belt

Idler
Pulley	Deck
	Pulley

Figure 21

•Remove the belt cover at the two outside deck pulleys, by removing the self-tapping screws. See Figure 21 .

•Release the tension on the spring loaded idler by pushing the idler toward the rear of the deck.

•Remove the belt from around the idler pulleys, and remove from the three deck pulleys. See Figure 21 .

•Reassemble new belts, following instructions in reverse order.

Drive Belt

•Depress the clutch pedal and set the parking brake.

•Remove the deck from the lawn tractor.

•Raise and block the front wheels of the lawn tractor so you can work under it.

•Remove the transmission panel by removing the parking brake knob, relief valve rubber boot and truss machine screws.

•Raise the seat. Disconnect the battery cables. Remove the battery from the unit.

•Disconnect the idler pulley spring which is attached to a bracket on the frame, inside the left rear wheel. Use a spring puller or other suitable tool. See Figure 22 .

•Remove the three self-tapping screws from the cooling fan. Remove the fan.

•Remove the center bolt, lock washer and flat washer, and let the engine pulley drop down so the belt is past the belt guards. See Figure 22 .

•Roll the belt off of top sheave of engine pulley, onto the pulley hub.

Idler	Idler
Pulley	Pulley
Transmission	Spring
Pulley	Bracket

Figure 22

Hydrostatic Transmission Cooling

The hydrostatic transmission is cooled by the oil, fan and fins. If the hydrostatic transmission runs hot, check to see if the fan is in operating condition, the oil level is correct and the fins are clean.

NOTE: DO NOT use high pressure water spray or steam to clean the hydrostatic transmission.

WARNING: Disconnect spark plug wire and ground against engine before performing any adjustments, repairs or maintenance work on the tractor.

Fuel Filter

•Your unit is equipped with a replaceable in-line fuel filter. Replace filter whenever contamination or discoloration is noticed. Order replacement filter through your authorized engine service dealer.

Cleaning Engine & Deck

•Any fuel or oil spilled on the machine should be wiped off promptly. Grass, leaves, and other dirt must not be left to accumulate around the cooling fins of the engine or on any part of the machine.

•Clean the underside of the deck after each mowing.

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