This document provides specifications for an injection pump, including: 1. Operating specifications such as RPM, regulation percentage, and application. 2. Test stand calibration details such as pipe and injector specifications. 3. Pump calibration check points listing RPM, throttle position, fuel delivery, and advance measurements. 4. Pump setting details after service such as roller dimensions, linkage gaps, fuel settings at various RPMs.

1. INJECTION PUMP SPECIFICATION ©
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FULL LOAD RPM: 2100 CUSTOMER PART #: RE-504067 MODEL NO.: DB2635-5681
GOV. REGULATION: 7-10 % CUSTOMER'S NAME: SUPERSEDES:
ENGINE: 6068T JOHN DEERE DUBUQUE / TORREON EDITION NO.: 7
APPLICATION: 87 kW MERIT TRACTOR (SX5004) DATED: 11/20/2017
NOTE: THIS SPECIFICATION DEVELOPED WITH ISO LONG INLET STUD.
ALL SPEEDS ARE IN ENGINE RPM UNLESS OTHERWISE NOTED.
USE LATEST REVISION FOR ALL REFERENCED DOCUMENTS.
TEST STAND: ISO 4008:
1. CALIBRATING HIGH PRESSURE PIPES...SAE J1418/ISO 4093:
.063" (1.6 mm) I.D. X 25" (635 mm) LONG.
2. CALIBRATING INJECTORS... S.A.E. J968/ISO 7440:
0.5 mm ORIFICE PLATE NOP: 3000 PSI (207 BAR).
3. CALIBRATION FLUID...SAE J967/ISO 4113 (REF. S.B. 201):
a.TEMPERATURE AT INLET: 110°-115°F (43°-46°C)
b.SUPPLY PRESSURE (S.B. 334): 5.0 ± 0.5 PSI
(34 ± 3 kPa) AT PUMP INLET.
4. ELECTRONIC ADVANCE INDICATOR: 39938
PUMP INSTALLATION: IT-007
ROTATION-C-* LEVER ANGLES (REF.)
NAME PLATE-L-SIDE** THOT MIN.(∠B) 17°
#1 CYL.-5-O'CLOCK** THOT MAX.(∠C) 8°
THROTTLE-L-SIDE** S.O. (∠ E) N/A
TIMING MARK N/A S.O. (∠ F) N/A
E.S.O.(12V E.T.R.)
* VIEWED FROM DRIVE END ** VIEWED FROM TRANSFER PUMP END
PUMP OPERATING SPEED...HALF...ENGINE SPEED
AIR TIME TO HOUSING FLANGE (SEE SPECIAL NOTES)
PUMP CALIBRATION CHECKS: AS RECEIVED FOR SERVICE
(REF. SL-222)
1. 1000 RPM (WOT): OPERATE PUMP FOR 10 MIN. TO BRING TO
OPERATING TEMPERATURE AND CLEAR FROM SYSTEM.
2. 2300 RPM (WOT): RESET HIGH IDLE SCREW TO OBTAIN
13-15 mm³/STROKE (IF NECESSARY)
3. CHECK POINTS: (SEQUENCE MUST BE FOLLOWED AS LISTED)
THROTTLE
RPM POSITION mm³/STROKE ADVANCE
a. 150 WOT 27 MIN. ---
b. 400 WOT* 4 MAX. ---
c. 850 L.I.** 10-12 ---
d. 1200 WOT --- 2.5°-4.5°
e. 1400 WOT 76.5-80.5 ---
f. 2100 WOT 59-65 6.0°-7.0°
g. 2100 WOT* 4 MAX. ---
h. 2300 WOT 13-15 ---
i. 2350 WOT 5 MAX. ---
* E.S.O. DE-ENERGIZED
** RESET USING LOW IDLE SCREW, IF NECESSARY
PUMP SETTINGS: FOLLOWING PUMP SERVICE
1. ROLLER-TO-ROLLER DIMENSION: 1.9615" ± .001"
(49.82 mm ± .025 mm)
MAXIMUM ECCENTRICITY: .004" T.I.R.
2. GOVERNOR LINKAGE GAP: .125" TO .165" (3.2-4.2 mm)
(USE KIT #23093 S.B. 95)
3. 1000 RPM (WOT): OPERATE PUMP FOR 10 MINUTES TO BRING TO
OPERATING TEMPERATURE AND CLEAR AIR FROM SYSTEM.
4. 400 RPM (WOT):
a. CHECK SHUT-OFF: 4 mm³/STROKE, MAX.
b. CHECK FOR MINIMUM TRANSFER PUMP LIFT OF 18" HG.
(60 kPa).
5. 2100 RPM (WOT):
a. SET TRANSFER PUMP PRESSURE 87-89 PSI,
(600-614 kPa)(SUPPLY SET PER TEST STAND NOTE 3B)
b. ADJUST RETURN OIL TO 225-475 CC/MIN. RECHECK TRANSFER
PUMP PRESSURE.
c. CHECK HOUSING PRESSURE FOR 8.5-13.5 PSI,
(59-93 kPa).
6. 1200 RPM (WOT): SET ADVANCE TRIMMER SCREW FOR 3°- 4°.
7. 1400 RPM (WOT): SET ROLLER-TO-ROLLER FUEL DELIVERY:
78-79 mm³/STROKE.
8. 2100 RPM (WOT): SET TORQUE SCREW TO 61.5-62.5 mm³/STROKE.
9. 2300 RPM (WOT): ADJUST HIGH IDLE SCREW TO OBTAIN
13-15 mm³/STROKE.
10. 850 RPM (L.I.): SET LOW IDLE SCREW FOR 10-12 mm³/STROKE.
11. CHECK POINTS:
THROTTLE T.P.
RPM POSITION mm³/STROKE ADVANCE PRESSURE
a. 150 WOT 29 MIN. --- 10 MIN.**
b. 400 WOT* 4 MAX. --- ---
c. 850 L.I. 10-12 --- ---
d. 1200 WOT --- 3°-4° ---
e. 1400 WOT 78-79 --- ---
f. 2100 WOT 61.5-62.5 6.0°-7.0° 87-89***
g. 2100 WOT* 4 MAX. --- ---
h. 2300 WOT 13-15 --- ---
i. 2350 WOT 5 MAX. --- ---
* E.S.O. DE-ENERGIZED ** (69 kPa) *** (600-614 kPa)
12. SPECIAL NOTES:
a. TORQUE ALL FASTENERS PER S.B. 106.
b. ELECTRIC SHUT-OFF TO BE CHECKED PER S.B. 108.
c. ASSEMBLE THROTTLE LEVER SPACER AND ARM IN B4-L
POSITION PER S.B. 164.
d. SEAL FASTENERS PER S.B. 134R.
13. FOR SERVICE ONLY:
AIR TIME PUMP USING STANADYNE AIR TIMING FIXTURE
42973 WITH HUB ADAPTER 29711. CONNECT AIR SUPPLY WITH 60-
100 PSI (4.1-6.9 BAR) TO #1 CYLINDER OUTLET. SET TOOL TO 210°
AND INSTALL TO DRIVE SHAFT. SLOWLY ROTATE TOOL CLOCKWISE
UNTIL ROLLERS STRIKE CAM RING AND TOOL STOPS, SCRIBE LINE
ON HOUSING FLANGE. REPEAT PROCEDURE TO ENSURE
ACCURACY. IF INTERFERENCE BETWEEN STRAIGHT EDGE AND
HOUSING FLANGE OCCURS,PLACE WASHER (i.e. 13521) BETWEEN
STRAIGHT EDGE AND TOOL.

2. DB2635-5681 EDITION 7 DATED 11/20/2017 Page 2 of 4
Note:
Note:
Note: REFERENCE S.B. 444

3. DB2635-5681 EDITION 7 DATED 11/20/2017 Page 3 of 4
Note: * O.S. METERING VALVE AND ARM ASSEMBLY 27130 REFERENCE S.B. 336
Note: THROTTLE LEVER BUSHING OUT
Note: ASSEMBLE 22658 PISTON WITH PART NO. TOWARDS PISTON HOLE PLUG.

4. DB2635-5681 EDITION 7 DATED 11/20/2017 Page 4 of 4
Note: INSTALL GROUNDING STRAP ON LEFT SIDE VIEWING TRANSFER PUMP REF. S.B. 108
FOR SERVICE USE ONLY
APPLICABLE SERVICE ASSEMBLIES FOR ENGINEERING USE ONLY
Assembly Description
15093 THROTTLE SHAFT BUSHING REPLACEMENT
26431 ESO MOUNTING AND GROUNDING KIT
32980 PILOT TUBE REPLACEMENT (REF SB 171C)
33814 GASKET KIT
DATE ECN NO EDITION
06/01/2000 26523 1
04/14/2003 28182 2
07/18/2008 31503 3
07/18/2008 33008 4
01/31/2014 36592 5
03/31/2016 39031 6
11/20/2017 39745 7