TB-32: Chain Saw Flashcards
There are two ways that a chain brake is engaged:
manual and automatic.
The chain break engages within
1/10 of a second
DO NOT operate a chain saw at speeds above idle when
chain brake is engaged or engine damage may result.
utting is an operation involving a minimum of two members:
the operator and safety person:
- Alert the operator of changing or unsafe conditions
- Prevent injury.
- Assist the operator who is backing up while involved in cutting operations.
When cutting avoid making…
Excessively long cuts
If you have determined that a defensive hole is necessary,
remember to trade “space for time”.
Flooded cylinder
a. Place on/off switch in “off” position
b. Push in choke - ensure that the choke is not engaged
c. Pull starter cord 4 to 5 times
d. Turn switch “on”. Use normal starting procedure.
Safe depth of cut is a cut deep enough to
accomplish intended ventilation operations without destroying tire structural integrity of the roof:
Safe depth of cut will depend on four factors:
- Type of construction
- Thickness of roof covering
- Thickness of decking
- Intended operations
If carbide tips become damaged, it will be necessary to replace the chain when:
- Missing/damaged tips on 3 or more cutters in a row.
- Missing /damaged tips on 6 or more cutters at random.
- Cracked/broken tie straps
- Dull chain
Daily Checks
- Check fuel level. Add mixed fuel if necessary.
- Check lubricating oil level. Add if necessary.
- Check chain condition, tension, and proper direction of travel.
- Check controls for proper starting position.
- Check carrying strap and hooks for condition.
- Check gauntlet gloves for proper location and condition.
- Make a visual check of tile chain saw for loose fasteners and/or covers.
Weekly Checks
- Perform daily checks.
- Start chain saw.
- Depress manual oiler several times if chain saw is so equipped.
- Run up RPM by alternately depressing and releasing throttle trigger. Run until warm.
CAUTION
Do not run chain saw at full RPM without load for more than a few seconds or engine damage may result,. - Check to see if chain is oiling properly.
- Place chain saw on firm surface. At idle speed, engage chain brake. Improper chain brake operation shall be reported to the shops.
- Shut off chain saw and allow to cool.
- Check chain tension and readjust if necessary.
- Inspect starter cord for fraying and contamination. Inspect security of starter cord handle.
- Top off fuel and chain lubricating oil levels if necessary.
Monthly Checks
- Perform daily checks
- Remove spark plug. Check gap and condition. Clean, regap or replace if necessary.
NOTE
Proper spark plug gap can be determined by reviewing owner’s manual specifications or contacting the shops.
Always have a spare spark plug available for use. - Inspect engine case for cracks and/or leaks.
- Inspect the fuel assembly for leaks, cracks or soft fuel lines. DO NOT operate chain saw if a fuel leak exists.
- If a tank of fuel has not been used in the previous 30 days, drain fuel and refill with fresh fuel mix.
- Remove air cleaner housing. Check air cleaner for tears and general condition.
- Inspect security of carburetor and all linkage.
Clutch engages at:
3,000 RPM
Idles between…
2,400 RPM & 2,600 RPM
Horsepower
4.69 hp
