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EDITION NO. 14
ENGINE
350 V-8
APPLICATION AUTOMOTIVE
VEHICLE 1978
NOTE: A,
TEST STAN,,
INJECTION PUMP
MODEL
D
25PC31
SPECIFICATION
SUPERSEDES MODEL
. ,,ATED l-30-81 ( TEST DATA FOR
SERVICE USE ONLY)
CUSTO MER PART NO. 559073
CUSTOMER’S NAME 8, ADDRESS:
FULL LOAD RPM l&o()(J
OLDSMOBILEDIVISION
GENERALMOTORSCORP.,
GOV. REGULATION 10
2 ISSUED BY: J. McMahon
LANSING, MICHIGAN
SPEEDS ARE IN ENGINE RPM UNLESS OTHERWISE NOTEDf+ 5 RPM)
1. INJECTION LINES.............~~~" I.D. BY 25" LONG
2. NOZZLES: 0.5 mm Orifice Plate (Ref. S.B. 334 )
3. NOZZLE OPENING PRE:SURE...................1700+25 PS
4. CALIBRATING OIL-SAL: 5967 (Latest Revision)
TEMPERATURElO-116°F (at inlet)
5. LOW PRESSUREPLUMBINGSYSTEM - PER S.B.334
6. CAM MOVEMENTREAD-OUT DEVICE 21734
ALL FUEL READINGS ARE AT 500 STROKES
PUMP OPERATjNG SPEED
HALF
ENGINE SPEED
‘““;“: f:;;~~:RC’E&,ut_off (12~ ETR)(TEST WITH 8.8 VOLTS MAX.
2. Speed Advance
5. Min-Max Governor II
3. Delivery Valve
4. Temoerature ComDensatinq Leaf
PUMP SETTiNGS
ROLLER-TO-ROLLERDIMENSION...1.9710 2 .0002"*
*Maximum Eccentricity: .008" TIR
~---. - ‘
LINKAGE GAP...... .;__
75" to lfx”
OPERATEPUMP AT 1000 RPM ii&i-;
.._.I .-OR 10 MINUTES TO
BRING TO OPERATINGTE
MPERATUREAND CLEAR AIR FROM
SYSTEM.
I.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
CHECKE.S.O. FOR PULL-IN WITH 8.80 VOLTS MAX.
THROTTLE LEVER IN LOW IDLE POSITION AT 400 RPM.
SET T. PUMP PRESSURE@ 2000 RPM (WOT) FOR 58-64 psi
(TEST STAND BOOSTPRESSURESET AT 5 + 0.5 psi)
CHECK FOP MINIMUM LIFT OF 18" HG. AT 400 RPM.
ADJUST RETURNOIL TO 250-350 cc/min. 0 2000 RPM
(WOT)
CHECKHOUSING PRESSUREAT 2000 (WOT) FOR II-17 n?i
USE GAGE 21914
- .- r-
TO SET THROTTLE'AT-il" ccw, AS
MEASUREDBETWEEN HROTTLE BALL STUD AND THROTTLE
SHAFT VERTICAL CENTERLINE.
WITH GOVERNOR OVER REMOVEDAND THROTTLE SHAFT IN
LOW DLE POSITION ('STEP 9), SET MIN MAX GOVERNOR
4SSEMBLVFOR 10 i 2 mm3/stroke at 575 RPM (FUEL
REAOING WITH COVER INSTALLED).
SFT ADVANCEFOR 3-3.5" AT 2000 RPM (WOT)
SCREW, cover hold-down
LOCKWASHER, over screw
CONN. ASSY., return line
GASKET, governor cover
SHAFT, drive
SEAL, drive shaft (BLACK
SEAL, drive shaft (RED)
SEAL, pilot tube
PIN, shaft retaining
COVER. timing line
SCREW, timing line cover
PLATE, name
SCREW, name plate
mmr
EL
3
3
;
1
2
1
;
1
2
1
2
I
45
12a. FUEL bELIVERY' f 2.5 mm3/stroke @ 2000 RPM (WOT)
MAXIMUMCYLINDER VARIATION 3 mm3/stroke
b. CHECK CRANKINGDELIVEflV 0 200 RPM (WOT) 15 mm3/st. MIN.
12 psi min. T.P. PRESS. AND O-10 psi HSG. PRESSURE
c. SET 32-34 mm3/stroke @ 1500 RPM USING BLOCK 1121894
AND MAXIMUMTRAVEL ADJUSTING SCREW, WITH BLOCK
REMOVED, CENTERLINE OF- BALL STUD MUST BE 26'-36'
FROM SHAFT VERTICAL CENTERLINE (USE GAGE 21914)
CHECKPOINTS3.
**
14.
;::
17.
18.
19.
a. AT lg,O RPM (W T)
Y
DE-ENERGIZE ELECTRIC SHUT-OFF - FUEL
SHOULDBE 4 mm stroke, MAXIMUM. RE-ENERGIZE E.S.O.
THRTL. MM3/
RPM POS
STROKE
MAXIMUM CAM (19 d
_A
CVL.VAR. MOVEMENT
;iF$SURE
0. Iall LO IDL 2 MAX
-__~ :_HSG,
--.- ---
C. 1500 WOT ---
d. 1500 ADJUST lo-11 I:::
1.50-3.0" 1:: ---
8-12
3.50-5.5" ---
8-12
e. 3600 WOT(18e)--- --.-
6.0"-8.0" ---
8-12
f. 4000 WOT
39i3
90-110 8-12
g. 4100 WOT
32 MIhl
:
h. 4400 WOT
13 MAX 5
8"-9"
125 MAX X-12
575 LO IDL lOiZ**
3
:SE L.I. SCREWTO ADJUST IF NECESSARY
---
4-12
CHECKG OF BALL
STUD TO VERTICALC OF SHAFT AT 39"-43"'(USE GAGE 21914)
AIR-TIME PUMP USING GAGE 21916 PER SB334_4.5" to -5.5O
NAME PLATE..LEFT..Viewing Trans. Pump End
TIMED.......LEFT..Viewing Trans. Pump End
TIMED TO CAM..(FOR REL. END Of: INJECTION)
TIMED TO THIS CYLINDER (FROM 7. PUMP END)---@
SPECIAL NOTES:
Torque all fasteners per XL784 or SB106
.
b.
c.
d.
e.
Pump to be tested with Fittings 21879 & 21606 installed
Seal Maximum Travel Adjusting Screw with Retaining
Compound #21915.
Open Petcock for pressure check ONIY
If necessary to obtain advance requirements, use alterr--
ate Inner Advance Spring # 21911 and/or alternate Head
Locatinq Screw Assembly # 22240
__
ClJUNTI.R-
NOTE: PUMP MOUNTING-
HORIZONTAL PUMP ROTATION-CLOCKWISE
EO.SEAL PUMP FASTENERSPER XL874 OR SB365
.L
I
ART NO.
HOUSING & DRIVE GROUP
2351
1582
1879
2054
1204
2124i
21245
21660
1860
3622
1260
11331
12259
10464
0567
9916
1697
* APPLY A LIBER
1241 COMPOUND
SEALS TO SHAFT
10574
\SEF SVN-KUT BE
FORE ASSEMBLING
PART Ni
13521
21606
=
IMT
REP-
3
1
1
1
1
I
2
1
1
1
1
WASHER, cover screw
ELBOW, return line connector
SEAL, return line connector
COVER, qovernor control
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5
2
1
1
1
;
1
=
1
1
2
;
;
:,
1
=
1
2
;
1
:,
1
-
1
1
1
:
1
21196
Xl116
21116
11304
11196
11175
212f
135:
i 38:
164,
1641
138'
=
.r(ST,
Lo53
2123
1569
2052
2120
1983
15221
052'
129L
DB2825PC3145
MEAD &
ROTORGROUP
MYB. HEAD 6 ROTORASSEMBLY
ROCLER. cam
,+-%SHIOE, cam roller
.AM RING
OR 22075 (OVERSIZEJ FUR
O.E.M. ONLY-INCREASE
SPECIFIED R-k BY .0O6"
SEAL, hydraulic head
SPRING, leaf
SCREW, leaf spring
'1
1
,a
1
SCREW, hyd. head plug
SCREW, hyd. head plug
CONNECTOR. uel line
SCREW. locking plate
PLATE, locking
SEAL, locking plate
SCREW, delivery valve
STOP, delivery valve
SPRING, delivery valve
VALVE, delivery (SB143R)
0~ 13820 (OVERSIZE) AS req'd.
=;---_
-
IEIAINER, rotor
.INER, transfer pump
SPRING, trans. pump blddc
ING, liner locating
IEGULATOR SSY., trans. pump
-
OtSCRlCnO(I
SEAL, transfer pump
1228
2192
2126
2176
2126
1355
2189
2191
2484
1228
2232'
z281:
2176
2126
1355
2189
2191
2084
2294
2294
189~
1898
2292
TRANSFER PUMP CROUP
20526
21198
19895
19832
20529
20'523
B'LAiDE, ransfer pump
(Basic
Use 20511 or 20512 as req
:OLLPIN
SPRING, regulating
PiSTON, regulating
SEAL., inlet filter screen
RING, screen retainer
PLATE, trans. pump pressure
LUG ASSY.., end plate adj.
CREEN,
inlet filter
AP, transfer pump end
'SPRING, idling
GOV. ARM AND TEMPERATURE
COMPENSATORSSEMBLY
ISHAFT, govern&.arm pivot
SEAL, pivot shaft,
PIN
SLEEVE
1700, min.-max. gov. push
l_EEVE, thrust
or 1448:
IASldER, thrust sleeve
*IEIGHT, governor
FLINl3, gov. cage retaining
21266
1275
12214
11588
21760
1757
1758
1312
or t ,._.__,
GOVERNOR ROUP
_I_---
UT, pivot shaft
iPRING, min.-max.
IING, retaining
ILOCK ASSEMBLY
;TUD, guide
IASHER, guide stud
\RM ASSY.,
metering valve
SPRING, meterino valve arm
IALVE.-meterinn-
RETAINERASSY.. gov. weight
RETAINER ASSY., gov. wt.
RETAINER, governor weight
HUB ASSY... governor weight
RlNG. flexible retaining
:-
SPR:lNG, idling
GOV. ARM AND TEMPERATURE
COMPENSATORSSEMBLY
SHAFT, governor arm pivot
SEAL. pivot shaft
**SEE SERVICE ASSEMB E’
SLEEVE
22B4$Or:
ROD., min-max. gov. push
1266
1275
2214
1588
2327
2326
1312
1620
1201
2285
___N_OTE:_Use Spring__#21_266 With Sleevc#_2232?2
IUT, pivot shaft
IASHER
,PRING, min.-max.
tlLOCKASSEMBLY
STUD, guide
rlASHER, guide stud
4RM ASSY.,
metering valve
SPRING, metering valve arm
VALVE. metering or 22256
RETAINER ASSY.. gov.~weight
RETAINER ASSY., gov. weight
RETAINER, governor weight
HUB ASSY., governor weight
RING, flexible retaining
SLEEVE, thrust
or 14483
#SHEA, thrust sleeve
WEIGHT, governor
RIING, gov. cage retaining
I
LINKAGE GROUP
I
168 --,
1284
I285
7438
8021
2358
2368
2362
8020
1926
SHER, throttle shaft seal
N. vacuum rwdule drive
NG, shaft retaining
AL, throttle shaft
IOK ASSY.. gov. linkage
LINKAGE ASSV., governor
SCREW, gov. linkage hook
UASHER. gov. linkage hook
HOOK. governor linkage
'RING, qov. linkaqe hook
MASHER. throttle shaft
INlIT, ~max. travel screw
ISCREY. low idle
~PRINIG. low idle scren
%AfT ASSEM8LY. throttle
UA
PI
SR:
HO
SP
712
I
I
c-
--.
CREN,,max. throttle travel
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082825YC3145
Nill, trilrlmer screw
SEAL, piitorl hole plug
PISTON, spring
WASHCR,s.lide
PISTON, power
SiAl
,
piston hole plug
PLUG,.pist.on hole
SC/IL, piston hole plug
SCREW, car
advance
_ _^
STRAP, terminal grounding
LOCKWASHER, over screw
WASHER, terminal contact
WAY&R, terminal contact
SOLENOID FRAME 6 ARM ASSY.
1
1
1
2
1
1
1
1
1
;
;
1
-
13807
0113
12752
12622
'1241
2764
5438
0951
18493
12049
18501
I323
--
AUTOMATICADVANCEGROUP
3"ADV.
(SeeNote19eJ
/
I
--~
ELECTRIC SHLT-OFF GROW (E.T.R.)
NC
1494(
2160;
2178E
bte 1'
11507
2224
or 2;
12766
21611
14761
21511
1204'
1251
12501
'I
?24l
-
ICAP, advance adj. screw
SCREW, advance adjusting
SEAL, advance adj. screw
PLUG, piston hole (sprinq)
GUIDE, advance adj. spring
SPRING, outer advance
bPRING, inner advance or
21911 Sprinq,
inner advance
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