Exmark Frontrunner 4500-497 - Manual (Page 32)

Maintenance
• Pump drive sheave set screws.
• Line shaft sheave setscrews.
• Square head setscrews on Hydro pump control
arms.
• Sheave retaining bolt in the end of engine
crankshaft.
• Caster wheel spacer nuts.
• Fuel tank bulkhead fitting nuts.
• Motion control tab retaining bolt.
Adhesives such as “Loctite RC/609 or RC/680” or
“Fel-Pro Pro-Lock Retaining I or Retaining II” are
used on the following:
Fuel tank studs, where studs are inserted into tank.
Dielectric Grease
Dielectric grease is used on all blade type electrical
connections to prevent corrosion and loss of contact.
Adjustments
Note: Disengage PTO, shut off engine, wait for
all moving parts to stop, engage parking brake, and
remove key before servicing, cleaning, or making any
adjustments to the unit.
Pump Drive Belt Tension
Self-tensioning - No adjustment necessary.
Pump Drive Belt
Replacement
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. Remove pump drive belt.
3. Route new belt onto sheaves as shown in the
decal located on the right hand side of the left
hood support (see Figure 11).
Figure 11
Park Brake Adjustment
Check to make sure brake is adjusted properly.
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. Tilt seat forward and raise hood.
3. Pull the brake lever up into the engaged position.
4. Locate the park brake spring assembly (see
Figure 12). There should be a gap of 1/8 inch (3
mm) between the yoke and thin nyloc nut on the
brake bolt. If necessary, rotate the thin nyloc nut
to obtain the 1/8 inch gap.
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