OHASHI ES72G Operation Manual page 27

REGULAR MAINTENANCE
If chipper or counter knives becomes dull, it can cause
clogging, extra noise, and rotor overloading.
Check knives regularly for damage, cracks or dullness.
or chipping efficiency is reduced.
Always clear dust, dirt or chips before affixing knife
bolts or they may become loose easily.
REMOVE & AFFIX KNIVES - CHIPPER KNIVES
WARNING
ALWAYS turn engine OFF before opening covers.
ALWAYS secure rotor by placing rotor clutch lever to
ON before removing / affixing / adjusting knives.
1. Put rotor clutch lever to ON with engine off, loosen
the securing bolt on the rotor cover and open.
2. Remove the Hopper Lock Pin (location per photo A)
and affix to rotor cover (per photo B) to secure rotor
cover in open position.
(A) Hopper Lock Pin
(B) Hopper Lock Pin
3. With the rotor cover affixed open, insert a hex key
into the 3 socket bolts affixing the chipper knife
to the rotor and loosen the nuts on the other side.
4. Remove chipper knife and alternate edges by
turning knife or replace knife. Tightly secure
socket bolts (110 N.m torque wrench).
5. After mounting the chipper knives, the clearance
between chipper knives and counter knife must
be adjusted according to "Knife Adjustment".
REMOVE & AFFIX KNIVES - COUNTER KNIFE
If the counter knife becomes dull, chipping
efficiency is reduced.
1. Fold the hopper and place over the rotor
and onto the discharge unit.
2. Loosen and remove the 2 x M12 bolts fixing the
counter knife to it's bed.
3. Open rotor cover to remove counter knife.
Alternate edges or replace knife with a new one.
Tightly secure the 2 fixing bolts.
4. After mounting the counter knife, the clearance
between chipper knives and counter knife must
be adjusted according to "Knife Adjustment".
IMPORTANT
ALWAYS perform knife adjustment after moving
knives. Refer "Knife Adjustment" in this manual.
1) Replace spring washers after moving knives.
2) When replacing knives, also replace bolts, nuts,
spring washers and plain washers.
24
Fixing Bolts