Troubleshooting - Exmark Ultra Vac Laser Z HP Operator's Manual

Troubleshooting

Important: It is essential that all operator safety mechanisms be connected and in proper operating
condition prior to mower use.
When a problem occurs, do not overlook the simple causes. For example: starting problems could be caused
by an empty fuel tank.
The following table lists some of the common causes of trouble. Do Not attempt to service or replace major
items or any items that call for special timing or adjustment procedures (such as valves, governor, etc.). Have
this work done by your Engine Service Dealer.
Note: When disconnecting electrical connectors Do Not pull on the wires to separate the connectors.
Problem
Abnormal vibration.
Blower drive belt snaps or breaks frequently.
Excessive grass blowout from the deck.
Blower and tubes plug too frequently.
Blower impeller does not spin freely.
Plowing leaves.
Chasing leaves.
Blower components show signs of wear
and/or air cleaners and cooling fins are dirty.
Possible Cause
1. Cutting blade(s) is/are bent or unbalanced.
2. Blade mounting bolt is loose.
3. Loose blower pulley or pulley assembly.
4. Blower impeller blades are bent.
1. Idler arm is out of alignment.
1. Bags are full.
2. Plugged screen in bagger hood.
3. Ground speed is too fast.
4. Blower belt is worn, loose, or broken.
5. Plugged tube or blower.
6. Conditions are dry.
1. Bags are too full.
2. Ground speed is too fast.
3. Grass is too wet.
4. Grass is too long.
5. Plugged screen in bagger hood.
6. Blower drive belt is worn, loose, or
broken.
7. Blower is plugged.
1. Plugged blower.
2. Impeller not aligned.
1. Deck is too low.
1. Blowout from deck.
1. Sand or dry conditions.
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Troubleshooting
Corrective Action
1. Install new cutting blade(s).
2. Tighten the blade mounting bolt.
3. Tighten the appropriate pulley.
4. Contact an Authorized Service Dealer.
1. Correct the alignment of the idler arm.
1. Dump more frequently.
2. Remove debris, leaves or grass clippings
from the screen.
3. Drive slower at full throttle.
4. Install new blower belt.
5. Locate and remove plugged debris.
6. Use lower lift blade.
1. Dump more frequently
2. Drive slower at full throttle.
3. Cut grass when it is dry.
4. Cut grass more frequently or at higher cut
height.
5. Remove debris, leaves, or grass clippings
from the screen.
6. Install new belt.
7. Use low lift blades in wet conditions.
1. Remove debris, leaves, or grass clippings
from the blower impeller.
2. Contact an Authorized Service Dealer.
1. LHP below S/N 600,000:
Raise the deck slightly.
Triton: Raise the front adjustable
baffle.
1. LHP below S/N 600,000: Install
an anti-blowout kit–contact
an Authorized Service Dealer.
Triton: Lower the front adjustable
baffle. Match discharge opening to Ultra
Vac intake.
1. Use low lift blades on the cutting
deck and higher cutting heights.
Clean air cleaners and cooling fins
frequently.