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STEERING SHAFT
Lubricate steering shaft at least once a season with light
oil.
ENGINE
Refer to the engine section of Iris manual for all engine
maintenance instructions.
CLEANING ENGINE AND BLADE HOUSING
Any fuel or 011 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 blade housing after each
mowing.
CUTTING BLADES
A. Removal for Sharpening or Replacement
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Steering Gears
A WARNING: Be sure to disconnect and
ground the spark plug wire and remove
ignition key before working on the cutting
blade to prevent accidental engine start-
ing. Protect hands by using heavy gloves
or a rag to grasp the cutting blades.
1. Remove the large bolt and lock washer which holds
the blade and adapter to the blade spindle.
2. Remove the blade and adapter from the spindle.
3. If the blade or blade adapter needs replacing.
remove the two small bolts, lock washers and nuts
which hold the blade to the adapter.
B. Sharpening
Remove the cutting blades by following the directions
of the preceding section.
When sharpening the blades. follow the original angle
of grind as a guide. It is extremely important that each
cutting edge receives an equal amount of grinding to
prevent an unbalanced blade. An unbalanced blade will
cause excessive vibration when rotating at high speeds.
may cause damage to the mower and could break,
causing personal injury.
The blade can be tested for balance by balancing it on
a round shaft screwdriver. Remove metal from the
heavy side until it balances evenly
NOTE: It is recommended that the blade always be
r'emoved from the adapter for the best test of balance.
FIGURE 17.
VARIABLE SPEED PULLEY
Lubricate needle bearings inside the variable speed
pulley with light oil once a season. Also lubricate the
bearings inside the pulley by putting a small amount
of light oil ort the shaft. Then start the tractor, and with
the shift lever in neutral, move the speed selector for-
ward and backward which will move the center sheave
and distribute the oil on the shaft. Be careful not to get
oil on the sheaves of the pulleys or on the belts. which
could cause the belts to slip.
TRANSAXLE
The transaxle is lubricated at the factory and does not
require che(:king. If disassembled for any reason,
lubricate with 10 oz. of Shell grease, part number
737-0148 (16 oz. package).
The rear axles may be lubricated once a season, us-
ing the access hole on each side of the transaxle hous-
ing. See figure 16. A push-type hand grease gun.
equipped with a special flush coupler is required. Use
Shell grease, part number 737-0148 (16 oz. package).
WHEELS
The f, Jnt wheels are provided with grease fittings. The
rear wheels must be removed from the axle for lubrica-
tion. Lubricate both front and rear wheels at least once
a season with automotive multi-purpose grease.
PIVOT POINTS
Lubricate all pivot points with light oil at least once a
season.
MAINTENANCE
C. Reassembly
Before reassembling the blade and the blade adapter
to the unit. lubricate the spindle and the inner surface
of the blade adapter with light oil. Lubricating the bolt
holes, bolts and inner surface of the nuts with light oil
is also recommended. A 4 oz. plastic bottle of light oil
lubricant is available. Order part number 737-0170.
Engine oil may also be used.
When replacing blades, be sure to install the blade with
the side of the blade marked "Bottom" (or with part
number) facing the ground when the mower is in the
operating position.
A WARNING: Disconnect the spark plug wire
and ground against the engine before per-
forming any repairs or maintenance.
TROUBLE SHOOTING
Refer to page 24 of this manual for trouble shooting
information.
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