waratah FL85, Operator'S Manual

Page: 17 / 80

Safety precautions: General
T7M7G6M,00002B0 -19-20JAN20-1/1
Saw Chain Hazard
Saw chain shot is the high velocity separation and ejection
of a piece or pieces of cutting saw chain from the end of a
broken saw chain in mechanized timber harvesting.
CAUTION: Saw chain shot exposes both
machine operators and bystanders to a risk
of serious injury or death.
Saw chain shot typically occurs near the saw drive
sprocket of the cutting system. Saw chain shot pieces
typically travel within 15 degrees on either side of the
saw bar plane.
A saw chain shot consists of two breaks in a saw chain.
First, the saw chain loop breaks, and forms two ends. One
end moves past the saw chain drive sprocket and is rapidly
accelerated due to a whip-like motion of the saw chain end.
The "whip action" causes a second break in the saw chain,
ejecting pieces of the cutting saw chain at high speed.
To reduce the occurrence of saw chain shot:
•
Do not exceed maximum saw chain speed
recommended by saw manufacturer.
•
Inspect saw chain and cutting system frequently.
Replace dull saw chain. Follow saw chain
manufacturer’s recommendations for saw chain tension
and saw chain lubrication. Replace damaged saw
chain, sprocket, bar, saw chain shot guard, and saw
chain catcher.
•
Always discard saw chain after a chain shot event.
•
Use only approved new replacement and repair parts
from the same chain or saw manufacturer.
•
Keep saw chains sharp and lubricated. Follow the saw
chain manufacturer’s recommendation when inspecting,
repairing, sharpening, installing, and breaking in saw
chains.
To reduce the risk of injury from saw chain shot:
•
Never expose operators and bystanders to the saw
chain shot hazard zone when saw chain is in motion.
•
All machines in saw chain shot hazard zone must be
fitted with appropriate guards, shields, and windows to
protect operator and operator structures in accordance
with safety standards and regulations for forestry
operations.
•
Impact resistant polycarbonate windows are
recommended.
•
Inspect the operator’s cab windows regularly and after
any impact. Replace if damaged, cloudy, or has visible
microcracking or crazing.
•
Inspect saw chain shot guard (if equipped) each time
the saw chain is replaced. Replace saw chain shot
guard if it is missing or damaged.
1— Saw Chain
2— Saw Bar
3— Saw Bar Tip 4— Saw Chain Drive Sprocket
5— Saw Chain Catcher
6— Saw Chain Shot Guard
15
15
15
15
XJ1097618
—UN—13SEP1
1
Saw Chain Shot Hazard Zone
TX1045990A
—UN—08JUN10
Saw Chain Shot Pieces
TX1078028
—UN—14SEP10
Saw Chain Break Without Saw Chain Shot Guard
TX1078029
—UN—14SEP10
Saw Chain Break With Saw Chain Shot Guard
6
3
2
1
5
4
TX1078030
—UN—08JUN10
Typical Saw Components
1-2-5 090621
PN=17