Northern Lights OLP LP445, Operator'S Manual

Page: 17 / 36

OLP 05/00
IMPORTANT: Injection pump mounting flange timing
mark (Figure 17-A ) and front plate timing mark
(Figure 17-B) presence and alignment MUST be veri-
fied before removing pumps from engine. DO NOT
reference internal timing marks (on pump cam ring
and governor weight retainer). If timing mark is not
clearly visible on front plate, scribe a visible reference
mark as accurately as possible in-line with mark on
pump flange.
10. Remove three injection pump mounting stud nuts.
Remove injection pump from mounting studs.
11. Plug or cap all openings on injection pump and take
pump to dealer for service
DB4 & DB2 INJECTION PUMP – INSTALLATION
1. Lubricate a new square sealing ring with clean
engine oil. Install ring into groove on front face of
pump mounting flange. Slide injection pump onto
mounting studs while inserting pump shaft into drive
gear.
2. Check pump shaft and index pin for proper
alignment with pump drive gear key slot.
IMPORTANT: Shaft roll pin may be easily damaged
if improperly assembled. Pump drive gear should
not move when initially installing pump index pin into
drive gear key slot.
3. Install injection pump partially onto mounting studs
without engaging pump pilot hub into engine front
plate.
IMPORTANT:
DO NOT tighten hex nuts more than
three full turns on mounting studs. Pump drive shaft
index pin may be damaged if pin is not properly
aligned with drive gear key slot and if the nuts are
tightened more than three turns.
4. Install three flat washers, lock washers, and hex nuts
onto pump mounting studs. Tighten nuts three turns
only so that pump will not fall off mounting studs.
NOTE:
The pump drive gear should begin to move
forward (away from engine front plate) with the pump
when flange is approximately 1/8 in. (3.2mm) away
from engine front plate.
4. Disconnect all fuel delivery (pressure) lines
(Figure
15-B)
from injection pump using a suitable 17mm
deep-well crowsfoot socket.
5. Remove injection pump drive gear cover. Remove
drive gear retaining nut and washer from end of
pump shaft. Be careful not to let washer fall inside
timing gear cover.
NOTE:
The injection pump drive gear fits snugly onto
a tapered drive shaft and indexed by a hollow pin or
Woodruff key installed in drive shaft
6. Attach JDG670A Drive Gear Puller
(Figure 16-A)
to
injection pump drive gear as shown.
NOTE: Replace 6mm Grade 12.9 cap screws (C) as
needed.
7. Evenly tighten the two 6mm, Grade 12.9 screws
(threaded in drive gear) and snugly tighten center
forcing screw
(Figure 16-B)
against end of pump shaft.
Figure 16.
Reproduced by permission of Deere & Company, c.2000. Deere & Company, All rights reserved.
8. Tighten center forcing screw until pump drive gear
is free from tapered shaft. Remove JDG670A puller
(Figure 16-A)
and screws from drive gear.
9. Check to make sure that timing marks on back side
of front plate
(Figure 17-A)
and injection pump flange
(Figure 17-B)
are present and properly aligned. This
assures that repaired or replacement pump can be
properly timed to engine when installed.
Figure 17.
Reproduced by permission of Deere & Company, c2000. Deere & Company, All rights reserved.
15
Servicing