Cub Cadet 53AJ8CTX750 User Manual
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operation - thusly the hands can be used for 
other functions.
7. Fuel Shutoff Valve: (See Figure 4.) Located
behind the operator’s seat, the valve has three 
(3) positions: “off”, “Left Tank”, “Right Tank”. 
Close this valve if you are not going to run the 
mower for a period of 30 minutes or more to 
prevent flooding the engine. The fuel system 
operates at 25 psi when the ignition switch is in 
the “on” position.
Note:
In the left tank position, fuel will be
drawn from the left tank only, and excess fuel 
not consumed by the engine will be returned to 
the left tank. This also applies to the right tank.
8.
Figure. 4
Fuel Shutoff Valve
Seat Adjustment Lever: The Seat Adjustment 
Lever is located beneath the seat. The Seat 
Adjustment Lever is used to move the seat for-
ward and backward. To place the seat in the 
desired position pull the seat adjustment lever 
to the left then push the seat forward or back to 
the desired position. Release the lever so the 
seat will lock in place.
9. Hourmeter (Digital Tachometer Optional):
(See Figure 1 on page 10) Located on the right 
side of the mower in front of the ignition switch. 
When the machine is running the tachometer 
displays engine rpm. When the machine is off 
the tachometer displays running time.
10. Warning Lights: Indicator lights are provided
to notify when conditions of “Low oil pressure”, 
“High temperature coolant”, “Low alternator 
output”, and “Trouble” are present.
Note:
There will be a flashing “LUBE” for
each recommended lubrication interval. There 
is a flashing “OIL” at each recommended 
engine oil and filter change.
C.Initial Adjustments
1.
Check the fluid levels and tires:
Note:
These checks should be made daily,
before starting the engine.
a. Fuel: Using a good grade of unleaded, reg-
ular gasoline (for a gasoline engine), fill the
fuel tank (beside the engine on the left or 
right side of the mower). When the fuel 
reaches one inch from the top of the tank, 
stop. DO NOT OVERFILL. Space must be 
left for expansion.
b.
Engine Oil: (Filled at the factory before 
shipment.) Pull out the oil dipstick, wipe it off 
and reinsert it. Pull it out again and read the 
oil level. If it is below the operating range, 
add oil through the fill tube using a funnel to 
bring it up to the top of the operating range.
Note:
Gasoline Engine: Use SAE 10W30 or
SAE 10W40 engine oil, rated for service SJ. 
Shell Rimula 15W40 is also recommended and 
provides service SL and CI-4 plus.
c. Engine Coolant: Use Shell Dex-cool,
extended life anti-freeze diluted with water 
to create a 50:50 mixture.
d. Hydraulic Oil: (Filled at the factory before
shipment.) The hydraulic oil tank is located 
beneath the operator’s seat. Always wipe off 
the area around the oil tank fill neck before 
checking the oil level to prevent dirt from 
contaminating the oil. Remove the cap and 
make sure the oil level is 1/4” below the oil 
tank fill neck. If the oil level is low, fill with 
Shell Rimula 15w40 or equivalent oil. Equiv-
alent oil should meet GM Allison C-4.
e. Tires: 8-10 psi Rear, 20-25 psi Front Caster
Tires
Note:
New tires are overinflated in order to
properly seat the bead to the rim. The normal 
working pressure for the traction tires is 8-10 
psi. The front caster wheels should be inflated 
to 20-25 psi.
2.
Check that all Nuts, Bolts and Screws are 
Tight.
3.
Check the tension of the deck drive belts.
a.
Remove the deck cover
b.
The tension of the deck drive belts are
maintained by a spring mechanism that 
adjusts for wear and stretch.
c.
Examine the belts for cuts, fraying, and
excessive wear. Replace if any of these are 
detected.
d.
Replace the deck cover.
4.
Adjust the Mowing Deck: The cutting height 
is set anywhere in the range of 1-1/2" to 5". You 
may need to adjust the mowing deck to achieve 
the proper angle for mowing. Follow the proce-
dures below to set the appropriate angle to the 
mowing deck.
a.
Park the mower on a flat paved surface, 
engage the parking brake, shut off the 
engine, remove the key from the ignition 
switch, remove connection of the spark 
plugs and using the second foot pedal, 
