Cub Cadet M48 Tank, Mounting Nut, Relief Valve, Handle Removed, Fittings Removed And Plugged

5.24.Remove the handle from the relief valve using a 7/16” wrench and a 3/16” allen wrench.

5.25.Remove the nuts from the carriage bolts that hold the hydro pump to the hydro pump mount- ing plate. See Figure 5.25.

MOUNTING NUT	RELIEF VALVE
	HANDLE REMOVED

FITTINGS REMOVED

AND PLUGGED

Figure 5.25

5.26.Carefully lower and remove the hydro pump. If it is to be returned to Cub Cadet, remove the yel- low plugs and allow it to drain completely before packing and shipping it.

5.27.Inspect all of the fittings and O rings prior to installation in the replacement pump.

See Figure 5.27.

DEFORMED O RING GOOD O RING

CHECK

THREADS

CHECK TAPERED SEATS

Figure 5.27

5.28.Prior to installation, pour oil directly into the pump inlet and high-pressure ports, then trans- fer yellow plugs back to the replacement pump.

M48 Tank

5.29.Position the pulley over the opening in the hydro pump support plate that the pump input shaft will pass through.

5.30.Position the pump so that the two bolts that secure it in position line-up with the two mount- ing ears on the pump, and the input shaft slips into the pulley as the pump is raised up to the hydro pump support plate. See Figure 5.30.

MOUNTING BOLT

PULLEY WITH KEY

NEW PUMP

Figure 5.30

5.31.Start both nuts that hold the pump onto their car- riage bolts.

5.32.As the pump is tightened into position, rotate the pulley to align the keyways, allowing the pulley to seat on the input shaft.

5.33.Install the fittings and lines, working quickly to minimize fluid loss.

NOTE: Use care not to over-tighten the O ring fittings, damaging the O rings.

NOTE: The lines may be installed finger tight to establish their positions, then tightened fully.

5.34.Install the belt, tension arm spring, steering link- age.

5.35.Install the fan, washer and nut to the input shaft. Torque the nut to 240 inch/lbs.

5.36.Install the debris screen.

5.37.Check the fluid level in the reservoir, purge the system as described in the test instructions.

5.38.If the hydraulic system has been drained and flushed with 20W50, install a new filter and fol- low the instructions for refilling the hydraulic sys- tem in the “Operator’s and Service Manual”.

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