CropHawk Draper Platform Operators Manual 55
Knife / Cutterbar
Service / Maintenance
Replacing Knife/Cutterbar Sections
IMPORTANT: To reduce risk of personal injury, always wear gloves when handling knives. Stand
to rear of knife when removing and installing.
Knife Removal
1.
Manually rotate knife drive until Knife is in fully out position (as pic-
tured).
2.
Loosen cap screw (A)
3.
Remove trunnion bolts (B) to disconnect knife from drive.
4.
Pull knife through guards until bearing assembly is separated from knife drive box.
5.
Remove cap screw (A).
6.
Remove bearing assembly (C ).
7.
If knife is to be fully removed joiners will need to be removed and knife removed in sections .
Knife Installation
NOTE: Replace nylon ring (E) anytime system has been previously operated
with improper knife head alignment.
1.
Install new nylon ring (E) in knife head of newly installed knife.
2.
Install bearing assembly in knife head
3.
Install cap screw (A) but do not tighten at this time
4.
Push knife back into guards until bearing contacts drive. Ensure drive is
positioned correctly to accept bearing and lightly tap trunnion (G) into
position. Tighten trunnion bolts (B) to 80 nm (59 ft-lb)
IMPORTANT: Setting of knifehead height is critical. If knifehead height is
not set correctly, binding or knife and gearbox failure can occur.
5. Set vertical position and angle of knife head so cutting surface is centred in
guard slot and is parallel to bottom of guard slot.
NOTE: make sure knife head does is not in contact bear-
ing shield (F).
6. Remove wear strips from 1st 3 guards on both sides of platform
7. Set vertical position and angle of knife head so cutting surface is centred in guard slot and is parallel to
bottom of guard slot.
NOTE: make sure knife head does not contact bearing shield.
NOTE: while tightening cap screw to specification take care to avoid twisting of cutterbar head and loss of knife
head setting. Failure to tighten cap screws will result in knife and drive damage.
8. Verify knife section is still properly positioned in first guard slot after knife head cap screw is fully
tightened.
9. Torque knife trunnion bolts (B) to 80 nm (59ft-lb) Knifehead cap screw (A) to 130 nm (96 ft-lb).
B
A
C
E
A
F
G
