Standard Extra Fuel Device; Thermally Activated Extra Fuel Device; M 12.00 Extra Fuel Device - Hatz Diesel 1D30 S Workshop Manual

M 12.00 Extra fuel device

–
General:
The adjustment of fuel quantity injected in
accordance with power output is done by
turning the body part 7.
Therefore remove complete extra fuel de-
vice only in case of a major overhaul i.e.
the device 2, at least the body 7, should
remain if possible.
NOTE:
Removal of complete extra fuel device re-
quires re-adjustment of fuel setting.
I. Standard extra fuel device
Function
Engine at stand-still (no oil pressure)
means the fuel limit stop pin is in open po-
sition i.e. extra fuel position (A).
Engine in operation (oil pressure) means
the fuel limit stop pin is in position to limit
the quantity of fuel injected in accordance
with power output etc.(B).
Preparations:
Ref.:M-Disassembly cross reference
scheme.
Dismantling:
– Mark position of extra fuel device on
crankcase for positioning in case body
part 7 moves during disassembly.
– Remove in numerical sequence 3...6.
Hold body part 7 tight to avoid any
movement during removal of closing
screw 3. Grub screw 1 remains tight.
Screw 3 has Loctite applied.
Slight heating of screw 3 softens Loctite
for easier removal.
Inspection / repair:
– Check parts for wear or any other dam-
age.
3
1D . . / 03.06
Assembly:
– Reverse in numerical sequence 6...3.
Apply locking agent as specified!
– Hold body part 7 tight to avoid any
movement during assembly of closing
screw 3. For pre-adjustment place extra
fuel device in such a way that the grub
screw and the middle position of the four
bores for adjustment line up.
II. Thermally activated extra fuel device
Function
Identified by „T" stamped on body 7.
A temperature controlled pin is fitted in-
stead of the standard pin 5.
Engine at stand-still (no oil pressure)
means the fuel limit stop pin is in open po-
sition i.e. excess fuel position (A).
Engine in operation, oil pressure moves
pin downwards.
Oil temperature below 45°C/113°F:
A bimetal spring limits travel of pin 5 and
the governor lever is still in a position to
inject more fuel then in the full-load posi-
tion (B).
Oil temperature above 45°C/113°F:
Bimetal spring retracts and pin drops down
to normal full-load position (C).
Dismantling / Assembly:
Ref.: Standard version.
Inspection / repair:
– Check parts for wear or any other dam-
age.
– Measure distance between top edge of
body part and pin as specified.
For any further advice contact your near-
est HATZ-Distributor.