The Handy THMC-A Operator's Manual page 14

REPLACEMENT OF PRUNER CHAIN
Remove the sprocket wheel cover.
•
Remove the guide bar and chain.
•
Remove the old chain and replace with the new chain.
•
Mount the guide bar and then fit the saw chain around the bar and sprocket, paying particular
•
attention to the correct direction of the chain.
Fit the chain tensioner into the lower hole of the guide bar.
•
Attach the sprocket wheel cover and loosely tighten the nut.
•
Using the black T-shaped spanner turn the chain tensioner clockwise until the chain fits snugly onto
•
the guide bar.
Tighten the sprocket wheel cover nut, then using gloves, pull the chain around the guide bar to check
•
that the chain has the correct tension without any tight spots.
Fill the chain oil reservoir with chain oil and before cutting, run the chain at medium speed to make
•
sure chain oil is thrown off. This ensures that the chain is being lubricated. Be sure to wipe excessive
oil off after filling. You may also want to drain the oil tank after each use to prevent spillage. Oil from
the tank can be stored and used, it does not have to be disposed of.
Note: After every second chain is worn out, the drive sprocket should be
replaced. To change the drive sprocket, remove the spring ring from the drive shaft and pull the drive
sprocket and the two washers off the drive shaft. If necessary use a penetrating lubricant. Then slide the
replacement parts onto the drive shaft and secure them with the spring ring.
It is very important to maintain proper chain tension as incorrect chain tension can cause the
guide bar to wear and the chain to come off. You should be able to pull the chain 5-6mm off the
bar. If the chain needs to be sharpened a 5/32" chain file should be used, these can be
purchased from Handy Garden Machinery under the product code: HP-106.
Operating the Pruner:
The Pruner is equipped with a low kickback chain, however, sometimes kickback can occur so
•
always hold the unit firmly in both hands.
Thin branches can be cut off with a single cut but if the branch is long it is preferable to cut it off in
•
several pieces.
For larger branches follow the diagrams below for a safe clean cut. Make the first cut from
•
underneath and cut through one third to half of the branch.
Do not work at an angle higher than 60 degrees as there is a danger of being injured by branches
•
falling without warning. Also be careful not to trip over fallen branches.
Before every use, check the level of the chain oil in the reservoir.
After each use clean any oil or saw dust out of the area under the plastic cover with a brush or
compressed air. Be especially sure to clean out the oil duct.
Sprocket
Chain
Tension
Spigot
Page 14