Cub Cadet 28HP Tank 53AB5JEZ630, Operator'S And Service Manual, Page: 18 / 36

Figure. 7
Cover
Plate
Spindle
18
side of the cutter deck (2); remove the linch-
pins on the left and right front side of the cut-
ter deck (2); and remove the linchpins on the
front of the mower (2).
f. Turn front caster wheels outward.
g. Shift the deck toward the ignition switch side
of the mower and remove.
h. To install reverse the process.
2. Changing a Blade:
a. Remove the Key from the ignition and dis-
connect the spark plug.
b. Jack up the front of the mowing deck about
one foot and block it in that position.
c. Wrap a rag around one end of the blade and
grasp it to prevent it from turning, or secure
the blade by placing a block of wood
between the blade and the deck housing.
d. Use a 1-1/8" socket wrench on the pulley
side of the spindle to secure.
e. Remove the hex nut using a 1-1/8" wrench.
f. Remove the hex nut.
g. To replace the blade reverse the above pro-
cess and tighten nut to 100-120 lb-ft.
WARNING:
Never mow with dull blades! Blades that are
bent should be replaced! The cutting blades are
sharp and can cause severe injury. Wrap the
cutting surface of the blade with a rag to avoid
injury.
3. Sharpening a Blade.
a. Set the parking brake.
b. Clean any debris from the blades. Keep
blades sharp and free of build up at all times.
a. Sharpen blades evenly at the original 30°
angle to maintain balanced cutting blades.
Do not sharpen the underside of the blades.
Use a electric blade sharpener, a conven-
tional electric grinder or a hand file to
sharpen the blades.
b. Replace any blade with severe nicks or
dents that cannot be removed by filing.
c. Check the balance of the blade after sharp-
ening by placing it on a blade balancer. Do
not use un-balanced blades.
d. If the blade dips on one end, file stock off of
the cutting surface on that end.
Note:
Blades that cannot be easily bal-
anced—REPLACE.
4. Changing the Blade Drive Belts:
a. Set the parking brake. Remove ignition key
and both spark plug caps.
b. Unscrew the wing nuts from the deck covers
and remove both covers.
c. Remove tension of the PTO belt by moving
the belt tensioning rod. Loosen the belt
retaining bolt.
d. Using a 1/2" socket breaker bar or socket
rachet insert the male end into the 1/2"
opening in the lower idler arm assembly and
pull the idler arm clockwise. While holding
the idler arm back, loosen the blade drive
belt from the pulley and slide the belt away
from the pulley.
e. Pull the tensioner pulley away from the belt
and remove the PTO belt then remove the
blade drive belt.
f. Reverse the process to install the belt.
Note:
When replacing belts do not over-
tighten. Adjust the idler pulley so that a ten-
pound pull with a spring scale between two pul-
leys deflects the belt about 1/2".
5. Changing the Spindle Assembly
a. Jack up the front of the mowing deck about
one foot and block it in that position.
b. Make sure the blade clutch is disengaged.
c. Remove the deck cover.
d. Remove the drive belts. (See 3. Changing
Blade Drive Belts.)
e. Remove the cutter blade. (See 2. Changing
a Blade.)
f. Using a wrench or socket rachet remove four
hex nuts, and the four hex head cap screws.
Remove the spindle assembly.
B.Hydraulic Oil
WARNING:
Never overfill the hydraulic units. Damage can
occur if the oil level is not within the proper oper-
ating range.
Note:
W
hen adding hydraulic oil, do so in
small quantities and recheck the oil level before
adding more. It is important that you do not
overfill the reservoir to allow for fluid expansion.