Contrate gearing speed change
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Nominal speed is not reached
Unless reaching the nominal speed of the header of about
n = 720 -750 U/min., the speed can be corrected by
changing the contrate gear within the transmission (K).
First to check whether the speed of the combine on the
PTO-shaft connection (B) in question is in line with the
factory specifications.
On the transmission box is marked a number on the pos.
(Z) showing the teeth number of the contrate gear.
The following formula allows to calculate the speed:
Combine speed x teeth number of contrate gear / 32 = header
speed
Change of contrate gear
PTO-shafts (B+G) to remove.
Screws of the transmission fastening on the backside to
remove and the complete contrate gear transmission to
take off the header.
New contrate gear to get from the manufacturer or dealer.
Attention!
The contrate gears are available only in certain gradations.
If intermediate speeds are required or wanted, change
speed gear to be mounted (page 35 / 010).
Changed teeth number of the contrate gear to mark on the
transmission box!
Opening of the transmission
Transmission to put down horizontally to avoid oil losses.
Screws (6) to remove.
Box cover to loosen by knocking with an adequate tool and
to take off. Shaft (12) with bearing (11) is still in the cover
(5).
Shaft (12) to drive out of the box cover (5) in arrow
direction.
Screws (13) to remove and contrate gear (15) to replace.
Works to be performed by an expert only.
Contrate gear transmission to remount to the
header
Contrate gear transmission to mount to the provided place,
if required together with PTO-shafts.
Fastening screws slightly to tighten such as to allow the
transmission still to be aligned (see white line X).
Only original screw length (6) to use, since longer screws
would destroy the transmission housing.
Guards to mount and trial run to conduct. Check the speed!
Oil level to check.
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