Northern Lights and NL1066H3, Руководство оператора

Страница: 28 / 41

ONL2-2 7/13
26
Servicing
IMPORTANT: Injection pump mounting fl ange timing
mark
(Figure 23-A )
and front plate timing mark (
Figure
23-B)
presence and alignment MUST be verifi ed
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, make a visible reference
mark as accurately as possible in-line with mark on
pump fl ange
.
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 fl ange. 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 fl at 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 fl ange is approximately 1/8 in. (3.2 mm) away
from engine front plate.
5. Install pump mounting fl ange fl ush to engine front
plate with drive gear held fl ush against front side of
engine front plate.
IMPORTANT: Do not use tightening force of pump
mounting stud nuts to pull pump shaft into drive gear I.D.
6. With the pump shaft index pin properly engaged in the
drive gear key slot, fi nger tighten mounting stud nuts.
7. Push pump drive gear fi rmly onto shaft taper. Install
washer and retaining nut
(Figure 24-C)
onto end of shaft.
Tighten retaining nut to 90 lb-ft. (122 N•m) for DB2,
150 lb-ft. (203 N•m) for DB4.
Figure 24
Reproduced by permission of Deere & Company, c.2005. Deere & Company, All rights reserved.
RG7630
IMPORTANT: Do not overtighten cap screws on pump
cover plate to avoid damage to O-ring.
8. Install access cover plate using a new gasket. Apply
LOCITE 242 (TY9370) to cap screw threads and
tighten to 1.7 lb-ft. (2 N•m).
9. Align timing mark on the pump fl ange
(Figure 25-B)
with
timing mark on the cylinder block front plate (
A
).
Figure 25
Reproduced by permission of Deere & Company, c.2005. Deere & Company, All rights reserved.
RG6278
10. Tighten the three hex nuts securing the pump to the
front plate to 20 foot lbs. (27 N•m).
11. Connect injection pump pressure lines
(Figure 26-E)
.
Beginning with outlet connection to #1 cylinder
(Figure
27-B)
and continue around the pump head in counter-
clockwise direction, attaching lines in same order as
engine fi ring (1-5-3-6-2-4 on 6-cylinder engines and
1-3-4-2 on 4-cylinder engines).