A l l l l i i s C h a l l m e r r s
Service Manual
WD, WD-45
WD-45 Diesel
THIS IS A MANUAL PRODUCED BY JENSALES INC. WITHOUT THE AUTHORIZATION OF
ALLIS CHALMERS OR IT’S SUCCESSORS. ALLIS CHALMERS AND IT’S SUCCESSORS
ARE NOT RESPONSIBLE FOR THE QUALITY OR ACCURACY OF THIS MANUAL.
TRADE MARKS AND TRADE NAMES CONTAINED AND USED HEREIN ARE THOSE OF OTHERS,
AND ARE USED HERE IN A DESCRIPTIVE SENSE TO REFER TO THE PRODUCTS OF OTHERS.
AC-S-WD,WD45
WD
Starting Serial Numbers
1948......................................7-9249
1949..............................9250-35444
1950............................35445-72327
1951..........................72328-105181
1952........................105182-131242
1953........................131243-146606
WD-45
Starting Serial Numbers
1953........................146607-160385
1954........................160386-190992
1955........................190993-217991
1956........................217992-230294
1957........................230295-236958
Paint Codes
Persian Orange #1 (1929-1960)
PPG.......................................DAR 60080
Martin-Senour ..........................90R-3723
Tisco..............................................TP280
DEALER'S
SERVICE
MANUAL
ALLIS-CHALMERS
MODEL
WD
&
WD-4S
TRACTOR
Allis-Chalmers Mfg. Co.
.
TRACTOR DIVISION
MILWAUKEE, WISCONSIN
U. S. A.
Compiled and Reproduced From Original by Jensales Inc.
ALLIS CHALMERS MODEL WD
WITH THE SUCCESS AND POPULARITY OF THE WC ALLIS-
CHALMERS, THE COMPANY INTRODUCED IN 1948 THE WD TRACTOR.
THE WC REMAINED IN PRODUCTION THAT YEAR, THUS IT IS
POSSIBLE TO OWN BOTH MODELS MADE IN 1948. THE WD CONTINUED
TO BE MANUFACTURED THROUGH 1957. IT IS ESTIMATED THERE
WERE APPROXIMATELY 131,200 WD'S MANUFACTURED.
IN THE NEBRASKA TESTS THIS ENGINE PRODUCED A DRAWBAR
PULL OF 4,300 LBS. FOR A TRACTOR THAT WEIGHED ABOUT 3,900
LBS., THIS WAS AN IMPRESSIVE SHOWING.
PROBABLY THE BEST DESCRIPTION OF THE WD WOULD BE A
SUPER VERSION OF THE WC. IT HAD SEVERAL DESIGN INNOVATIONS
THAT WERE READILY ACCEPTED AND HELPED MAINTAIN A LOYALTY TO
ALLIS CHALMERS ORANGE.
AMONG THE IMPROVEMENTS WAS THE LIVE POWER PTO. THIS
ENABLED THE OPERATOR TO STOP THE TRACTOR BUT KEEP THE, PTO
TURNING; AN ESPECIALLY VALUABLE FEATURE IN COMBINE O)?ERATION
THE WD ALSO INTRODUCED POWER ADJUSTED REAR WHEELS.
THUS, WITH A TURN OF FOUR BOLTS, THE REAR WHEELS COULD BE
ADJUSTED IN OR OUT. THIS FEATURE WAS TO BE COPIED BY MOST
TRACTOR COMPANIES. FOOT BRAKES REPLACED THE HAND BRAKES.
THE WD SOLD FOR ABOUT $1,800 EQUIPPED WITH STARTER,
LIGHTS, HYDRAULIC CONTROL, POWER ADJUST REAR WHEELS, AND A
201 CID ENGINE. THE ENGINE WAS KNOWN AS A SQUARE ENGINE;
THAT IS, IT HAD A 4 INCH BORE AND A 4 INCH STROKE WITH A
1,400 RPM RATING.
THE WD ALLIS KEPT THE SLEEK LINES OF THE WC; NAMELY THE
BULLET SHAPED TANK, THE STREAMLINED HOOD AND GRILLE. THIS
OUTWARD APPEARANCE OF THE LATE STYLED WC, WD, AND WD-45
ALLIS TRACTORS WAS TO REMAIN UNTIL 1957, WHEN AN ENTIRELY
NEW LINE OF TRACTORS WAS INTRODUCED WITH THE D-14,FOLLOWED
BY THE D-10 AND D-12.
Compiled and Reproduced From Original by Jensales Inc.
ALLIS· CHALMERS MANUFACTURING CO.
Milwaukee, Wisconsin
Allis-Chalmers "WD-45"
1954
General
AlUs· Chalmers
"WD.46"
Number and Size-Plows. . . . . . . . . . . . .. 3-14
Type-Axle, Adj. Axle, Tricycle...... All
Shipping WeIght on Rubber-Lbs...... 4450
~ebraska Test Number (Gasoline)... 499
Rear Tread, Adj. Range-Inches... .. 56-90
Height Overall-Inches............. 81~
Length Overall-Inches •..••••..••. 127.1
Wheelbase-Inches ••.......•.•.•••. 88
Cultivating Clearance-Inches •.•... 29
Hydraulic Power Unit .............. Std.
'" Belt Pulley-P.T.O.-Engine
Pulley Diame ter, S tandard-Inches. .. 9
Pulley Face Wid th:-Inches. . . . . . . . .. 6lh
Pulley Speed, Loaded-rpm.......... 1260
Pulley Speed, Loaded-fpm ...•.....• 2960
Power Take-off-Standard, Optional. Std.
Is Power for P.T.O. Continuous? ... Yes
P.T.O.·Cont. When Gearshifting? ... Yes
Engine-Make .......... . . . . . . . . . .. Own
Engine-Model ..................... W -45
Number Cylinders
&
Displacemen t. . .. 4-226
Rated rpm ........................ 1400
Brakes-Steeri n9-Tires
Brakes Type ...................... Shoe
Drums Location-Wheel Axle Shafts,
Bull PinIon Shafts................ BPS
Steering Type-Cam
&
Lever,
Worm' & Segmen t. . . . . . . . . . . . . . . .. W &S
Tire Size-Standard Rear-Inches ' .. 12x28
TIre Size-Standard Front-Inches . 6.5x16
Allis-Chalmers
"WD-45"
ALLIS-CHALMERS MfG. CO.
Milwaukee, Wisconsin
Transmission of Power
Clu tch-Dry Disc Spring Loaded? . .. •
Final Drive-Bevel, Spur ............ Spur
High Gear Ratio ................... 19.6
Low Gear Ra tlo ................... 72.6
Speeds-Number Forward .......... 4
Speeds-Number Reverse .......... 1
·WD has two clutches. Engine clutch Is single plate, sprIng loaded, dry type. TransmissIon clutch Is multiple disc, overcen ter, we t type.
Compiled and Reproduced From Original by Jensales Inc,
MODEL "WD" &
"WD45"
TRACTOR INDEX
SUBJECT
AIR CLEANER • • • • • • • • • • • • • • •
AMMETER
&
INSTRUMENT BOX • • • • • • • •
BA TTERY • • • • • • • • • • • •
BEL T PULLEY • • •
!_ • • • • • • •
BRAKES. • • • • • ••
>. • • • ••
BREA THER . . . . . . . . . . . . .
• • • • •
. . . . . .
CAMSHAFT • • • • • • • • • • •
.
.
CAMSHAFT &: VALVE:LIFTER.
CARBURETOR • • • • • • • • • •
CLUTCH-ENGINE • • • • • • •
CLUTCH-HOUSING • • • • • • • • • • • • •
CLUTCH-TRANSMISSION • • • • • • • • •
CLUTCH THROWOUTBEARING • • • • • • •
CLUTCH RELEASE SHAFT & FORK • • • •
CLUTCH SHAFT • • • • • • • • • • • • • • •
COOLING SYSTEM • • • • • • • • • • • • • • • •
CONNECTING ROD BEARINGS • • • •
CONNECTING RODS • • • • • • • • • • • • • • •
CONTROL PISTON AND LINKAGE. • • • • • • •
CRANKSHAFT BEARINGS • • • • • • • • • • • •
CRANKSHAFT & MAIN BEARINGS.
CRANKC3HAFT OIL SEALS • • • • • • • • • •
CRANKSHAFT WICK • • • • • • • •
· . . .
.
CYLINDER HEAD • • • • • • • • • • • • • • • •
CYLINDER LINERS, PISTONS & RINGS
DIAGNOSIS OF TRACTOR PROBLEMS • • • • • •
DIAGRAM, WIRING • • • • • • •
DIFFERENTIAL • • • • • • • •
DISTRIBUTOR TOP ASSEMBLY • •
DRA WBAR • • • • • • • • • • •
ELECTRICAL SYSTEM • •
ENGINE • • • • • • • • •
.
.
·
.
.
. . . . .
.
.
DISTRIB UTOR DRIVE. • • • • • • • • • • • • • •
.
.
.
.
• • • • • • • • • • •
ENGINE CLUTCH • • • • • • • • • • • • • • • • •
ENGINE REMOVAL. • • • • • • •
ENGINE DIAGNOSIS • • • • • • • • • • • • • • • •
ENGINE OILING SYSTEM • • • • • • • • • • • • •
ENGINE SUPPORT • • • • • • • • • • • • • • • •
FAN &: WATER
PUMP~'
• • • • • • • • • • • • • •
FENDERS • • • • • • • • •• • • • • • • • • • • •
FILTER OIL. • • • • • • •• • • • • • • • • • • •
FINAL DRIVE & REAR AXLE. • • • • • • • • • •
FLYWHEEL. • • • • • • • • • • • • • • • • •
FRAME CHANNELS • • • • • • • • • • • • • • • •
FRONT ENGINE SUPPORT. • • •
FRONT SUPPORT •• ,. '. • • •
FRONT WHEELS • •
~".
• • •
• ••
• • • • •
FRONT
&
REAR OIL SEALS • • • • • • • • • • •
FUEL . . • . • • • • • • • • •
. . . . . .
FUEL TANK
&
SUPPORT • • • • • • • • • •
.
GEAR COVER TIMING • • • • • • •
GENERATOR • • • • • • • • • • • • • • • • •
GOVERNOR LINKAGE • • • • • • • • • • • • • •
GOVERNOR &: MAGNETO DRIVE • • • • • • • • •
HEAD, CYLINDER • • • • • • • • • • • • • • • • •
HEADLIGHTS • • • • • • • • • • • • • • • • • • •
HOLD POSITION VALVE
. .
. . .
.
. . . . .
.
.
WD
SEC TION S PECIFICA TIONS
Page
Page
26
58
4
60
46
6
6
6
4
4 13
13
27
30
31
34
31
31
31
4
5
6
"
,
_
"WD"-"WD-45"
TRACTORS.
4
4
4
16
16
65
15
15
17
17
11
14
4
4
59
43
Z4
23
47
58
30
8
28
9
25
58
19
44
29
37
9
50,54
49,54
17
55
20
26
20
22
11
58
63,64
6
6
4
6
6
6
6
WD & WD-45
1
Compiled and Reproduced From Original by Jensales Inc.
SUB] I<C T
MODEL "WD" & "WD45" TRACTOR INDEX (Contld.)
WD
SECTION
Page
SPEClFICATIONS
Page
IIOOD • • • • • • • •
HYDRAUUC PUMP
HYDRAULIC RAMS
HYDRAUUCSYSTEM
INSTRUMENT BOX •
LIFT SHAFT • • • •
LIGHTS • • • • • • •
LUBRICATING OILS lvlArN BEARINGS ••
1v1AGNETO. • • • • • l'v1AGNETO DRIVE
MAGNETO TIMING •
MANIFOLD • • • •
.
. . .
.
.
.
.
.
.
• • •
• • •
.
. . . .
• • • • • • • •
• • • • • • • •
OIL FILTER ASSEMBLY • • • • •
OIL PRESSURE RELIEF VALVE • • • • • • • • •
OIL SEALS CRANKSHAFT • •
OIL SYSTEM • • • • • • •
OII~
SUMP. •
• ••
• • • • • • • • • • • • •
OIL PUMP. • •
PISTON • • • •
. .
• • • • • •
• • • • • • • •
PIS TON RINGS
POWER STEERING •
• • • • • • • • • • • •
POW ER TAKE-OFF. • •
• • • • • • • • • • • • •
• • • • •
POWER TRANSMISSION
PRESSURE RELIEF VALVE
PUMP, HYDRAULIC. • • • •
PUMP, WATER
&
FAN • • •
• • • • • •
• • • • •
• • • • • • • •
• • • • • •
PUMP LINKAGE AD] USTMENT • • • • • • • • •
PUMP TESTING. • • • • • • • • • • • •
PUMP TIPS • • • • • • • • • • • • • • • • •
QUADRANT & THROTTLE LEVER • • •
RADIA TOR • • • • • • • • • • • • • • •
RADIA TOR SHUTTER. • • • •
RAMS, TRACTOR.
RAMS, REMOTE. • • • •
• • • • • • • • • • • • •
• • • • • • • • • • •
REAR AXLE. • • • • • • • • • • • • • •
REAR WHEEL
&
RIM • • • • • • • • • • • •
• • •
RELIEF VALVE, OIL PRESSURE • • • • • • • •
ROCKER ARM ASSEMBLY • • • • • • • • • • • •
SEA T • • • • • • • •
II • • • • • • • • • • • • • •
SHAFT & FORK, CLUTCH RELEASE • • • • • •
SNAP COUPLER AND TRIP LEVER • • • • •
SPARK PLUGS • • • • • • • • • •
SPEEDS • • • • • • • • • • • • • • • • •
. . .
STARTER • • • • • • • • • • • • • • • • •
STEERING SHAFT SUPPORT
&
STEERING WHEEL • • • • • • • • •
STEERING SPINDLE SHAFT & GEAR • • • •
.
.
STEERING WORM & SHAFT • • •
SUPPORT, FRONT • • • • • • • • • • •
TAIL LIGHT. • • • • • • • • •
THROTTLE LEVER • • • • • •
• • • • • .
.
.
TIMING GEAR COVER & GOVERNOR
LINKAGE • • • • • • • • • • • • • • • • •
TIRES (FRONT OR REAR WHEELS) • • • • • • •
• • • TORQUE TUBE • • • • • • • • • • •
TRACTOR PROBLEMS • • • • • • • • • •
TRANSMISSION • • • • • • • • •
15
22
22
25
19
19
17
28
18
18
14
14
75
36
8
63
61
68
58
62
58
73
62
44
49
19
10
56
31
19
63-74
25
61
66
66
22
8
8
48
27
57
50
57
50,54
58
22
20
32,33
38,40
7
6
5
5
5
5
5
6
7
4
7
7
6
5
6
7
6
6
WD
&
WD-45
2
Compiled and Reproduced From Original by Jensales Inc.
SUBJECT
MODEL "WD"
~
"WD45" TRACTOR INDEX (Cont'd.)
TRANSMISSION CLUTCH
0 0 0 • • • • •
TRANSMISSION SHIFTER ASSEMBLY
VALVES.
0 0 • • • • • •
VALVE COVER • •
0 0 •
VALVE TIMING
0 0 0 0 • • •
WATER PUMP
&
FAN •
WIDE FRONT AXLE •
WIRING DIAGRAM
0 0
0 • • •
. .
. .
.
WD
SEC TION S PECIFICA TIONS
Page Page
34
38,42
11
9
11
25
54
59
6
5
5
Refer to rear of manual for additional miscellaneous infor· mation on following.
ENGINE VALVES . . . . . . . . . . . . . . . . . . . . . . . . . 3
CARBURETOR
&
INJECTION PUMP . . . . . . . .. 5·35
TRANSMISSION . . . . . . . . . . . . . . . . . . . . .. 37·42
ELECTRICAL SYSTEM & MAGNETO . . . . . . . 43· 55
WD & WD-4S
3
Compiled and Reproduced From Original by Jensales Inc.
BELT PULLEY
SPEEDS
Diameter
Face
R.P.M.
Ratio
Rotation
Location
Height
BRAKES
9
11
6-1/2"
1260 at 1400 R.P.M. goverJiled speed, 1530 at 1700 R.P.M. high idle
1 .11 engine to 1 pulle y
Clockwise
R.H. Side
31-1/2"
WD Tractor
First
Second
Third
Fourth
Reverse
W D-45 Tractor
Fii"'st
Second
Third
Fourth
Reverse
2-1/2 M.P.H.
3-1/2 M.P.H.
4-3/4 M.P.H.
9 M.P.H.
2 M.P.H.
2-1/3 M.P.H.
3-1/2 M.P.H.
4-3/4
10-3/4
M.P.H.
M.P.H.
3-1/4 M.P.H.
Type
Location
Adjustment
Drwn Dia.
DIFFERENTIAL
Type
Ratio (Std.)
WD Tractor
WD-45 Tractor
Lubricant Capacity
Enclosed contracting
One on each rear axle
Nut
7 -7/8"
STEERING
Two Pinion
Lubricant Capacity
Std. dual Front
All after
Single front Wheel or
Adjustable axle
Ratio prior to WD-71438
3 pts. U.S.
1 pt. U.S.
1 Qt.
U.S.
12 to 1
3.5 to
1
3.3 to 1
17
Qt.
U.S.
T RANSMlSSION
DRAW BAR
Type
Height
Type
Lubricant Capacity
Swinging
12" to 23" TRANSMISSION CLUTCH
Four Speed
17 qts. U.S.
FINAL DRIVES
Lubricant Capacity
FRONT WHEELS
Tire Sizes
Air Pressure
POW ER TAKE-OFF
Type
Spline size
R.P.M.
Height
Distance ahead of
Hitch Point
1 Qt. U.S.
Type
Disc dia.
Lining
Multiple disc over center s pring loaded.
7"
Bi-Metallic
BATTERY
5.50x16
28 lbs. Capacity
Size
6 volt 95 Amp.
15 plate
Specific' gravity (Full Charge)
1.270
Clutch INSTRUMENT BOX
1-3/8"x6B
Arnrrieter 548 at 1400 of Eng.
665 at 1700 of Eng.
20-3/4" Fuse
Light Switch controls generator charge rate
15 Amp.
REAR WHEELS
Tread
Tire Size
WD Tractor
WD-45 Tractor
Air pressure
9" and 14" LIGHTS
Bulbs
Candle Power
56" to 90"
GENERATOR
11 x 28 or
12 x 28
12 x 28 or
13 x 28
121bs.
Type
Charge Rate
Drive
Lubrication
R.P.M.
6-8 volt single contact
32
Third brush
3 to 13 amps.
V belt
Oilers-front and rear
27 to 2775 at high idle
WD &: WD-45
6
Compiled and Reproduced From Original by Jensales Inc.
ROCKER ARM ASSEMBLY
Removal
Remove the hood and valve t:over. Remove oil line from head to rocker arms and the four support retaining nuts and washers. Lift assembly from head.
Remove the cotter pins or hairpins from the end of shaft and remove the rocker arms, springs and supports from the shaft.
Inspection
Check the shaft and rocker arm bushings. The combined clearance should not exceed .008!'
The rocker arm face contacting valve should be refaced if worn flat. Reface to correct curvature on the valve lathe. The two halves of the supports should be oil tight at the joint and flat at top surface contacted by the flat washer.
All supports must be of the same length from center of shaft to cylinder head.
The intake rocker arm has an oil shed ground in its
upper
surface between the shaft and the valve stern. This shed governs the amount of oil allowed to reach the intake valve. Excess oil to intake valves causes abnormal oil consumption. Check the assembly while in operation and correct any leaks or spray which might strike intake valves. In the event of continued oil consumption it may be necessary to decrease the width of oil shed slightly.
In some extreme conditions the oil to the exhaust rocker· arm caused a splash from the exhau3t valve spring to the intake valve. Excessive wear of rocker arm bushings will cause unseen distribution of oil to the valves.
Assembly
Assemble the short spring towards the center oil tube connection. Place the exhaust arm. support, intake arm, long spring, intake arm support, exhaust arm, washer and retainer on the shaft in order. Assemble opposite end the same. Install supports so split side of support is towards the push rods. Use the short cork in shafts with cotter pins.
Late type shafts do not have the center collar on shaft. The oil tube simply enters hole in shaft.
When tightening assembly to head, shift shaft supports, etc., until the two end rocker arms are free.
Adjust the valve clearance to .012" with the engine heated to normal temperature. Adjust the
FLAT WASHER valves with cylinder on its compression stroke.
Valve breakage is caused by worn guides, rocker arm contact surface worn flat, valves sticking or excessive valve lash clearance. (For furhter information refer to VALVES general section).
Excessive valve lash clearance retards valve timing and lowers engine efficiency.
When installing the valve cover, do not tighten retaining nuts enough to crush the cover. Stop tightening just before cover strikes the cylinder head.
ROCKER ARM OIL BAFFLE
Effective WD-45 engine ],,3087, oil baffle 226721 was used in production., and should be installed on all WD-45 Engines 1001 to 13087, this baffle is placed on the four support studs .and held in position by four pal nuts. The baffle is used to keep oil splash from push rods from striking valve sterns to eliminate oil consumption.
Effective WD-45 Engine 28420, baffle 226761 was used, this baffle is similar to above, but is retained to support studs by the support stud retaining nuts, (no pal nut necessary) both above baffles are used with the new type cylinder head and the short rocker arm shaft supports.
Baffle 227137 is supplied to be used on WD engines prior to 289000 (except 253200 thru
253489) that have the old type cylinder head
(3" high) and taller rocker arrn supports, where the engine block has been replaced with the newer type WD-45 Block.
A new cylinder head gasket 227077 has been made available for service on engines prior to
72459, and replaces gasket 211433 when engine is equipped with the new 227049 cylinder block assembly.
WD & WD-45
10
Compiled and Reproduced From Original by Jensales Inc.
MACHINED SURFACE TOP OF HEAD
ROTOCAP
NEW STYLE HEAD VALVE GUIDE INSTALLATION
9
15 4 13 3
14 10
12 8 5
2
II 6 7
When using the old style 3
11 high head guides must be pressed in the head until the bottom scribe line on guide is flush with the top of head.
The exhaust guide is the shorter. When installing valve guides in new cylinder head (used on engine
#lW
-289000 and up) it will be necessary to drive exhaust valve guide until top of guide is flush with machined surface as shown in sketch at
IIA
II ..
Drive intake guide to 1/8
11 below machined surface as shown at liB II. Use a press or a special driver to install guide to prevent swelling and collapsing guide bore.
The roto cap is installed in the place of the valve spring retainer (as shown). All other valve parts remain the same, and the specified clearance of
.012
11 is retained.
These rotor caps can be installed' on all IIW II
engine exhaust valves.
I
A new gasket eff. IIW II engine 289000 used for service on all engines above,.
"w
II 72458 having varied sized water openings on right side of gasket to more evenly control water temperature.
The smallest of these openings toward front,
Gasket #1211433 to be used on all engines prior to
IIW II engine #172.458.
Refaceothe valve seats using a high speed grinder and 45 stone. Use a 60 0 and 30 0 stone to narrow seat surface. The seat width should be 1/16
11 •
Insta,ll head using a new gasket. Tighten to
90 Ibs. torsion following the chart. On the three
3/8
11 stud tighten to 2.5 Ibs.
Lap the valve to its seat, using fine compound.
The seat should be polished all the way around.
Check by making pencil marks across face of valve about 1/4
If
11 apart. Place valve on seat and rotate valve about 1/2" using high pressure.
Turn valve on equal distance in opposite direction. Repeat several times. The pencil marks will have their centers broken if the seat is good. all are not broken repeat the lapping operation.
Oil the valve stem and seat. Place valve in position and install safety snap wire, spring seat, spring, spring retainer and locks.
If leaking cylinder head gaskets are encountered the tapped holes in the top surface of the cylinder block should be checked for depth. The holes should be 1 -1/4 II deep and contain 7/8 II of full thread. They may be checked by installing the long and short capscrews in their respective holes, finger tight. The long capscrews should measure 3-13/16
11 or less between under side of capsc rew head and cylinder block. The short capscrew should measure 3_1/4
11 or less. If these measurements cannot be obtained, retap the hole with a 1/2.
11 -
13 bottoming tap one or two threads deeper.
Effective IIWD,tt. Engine #1299173 PA and above a positive type roto cap is used on the exhaust valves.
The purpose of the positive type roto cap is to turn the valve slightly each time it is opened to reposition it on its seat.
A new cylinder head gasket 2.2.7077 has been made available for service on engines prior to '12.459, and replaces gasket 2.11433 when engine is equipped with the new 2.2.7049 cylinder block assembly.
WD lit WD-4S
12.
Compiled and Reproduced From Original by Jensales Inc.
adjusting delayed action screw
"e"
(See instruction book for location). After the front gangs are fully lifted the pressure increases until the check ball is forced frotn its seat raising the rear gang.
When lowering, move lever to detent position; the pUtnp is then in the lowering position which drops the front gang only. Further tnovetnent of the hand control lever turns the catn against the catn pin forcing the ball frotn its seat releasing oil frotn the rear ratn, dropping the rear gang. screw
"e" and check ball spring. The delay tnay be further increased by cutting down the pUtnp volutne by turning in on volutne screw "D".
The putnp is operated at engine speed and the adjusttnents are tnade to cotnply with the particular forward gear used. For exatnple if adjusted to secure the desired delay in third gear, the pUtnp will need to be re-adjusted if any other gear is used, in prder to secure the satne atnount of delay.
With delayed action screw
"e" turned clear in.
It should require 875 to 975 P.S.I. to raise the ball frotn its seat. The delay is governed by the atnount of spring pressure applied to check ball by delayed action
PUMP, RAM AND DRA WBAR
DRAWBAR CONTROL
LEVER
This chart shows the drawbar, drawbar spring, link rod, putnp, etc.
The drawbar is connected to a fork which pivots in the·drawbar support and its upper end bears against the drawbar spring.
This spring is a variable rate spring, requlring very..little pressure to cotnpress it at start and gradually requiring tnore pressure as it is COtnpressed towards a solid height.
The spring is preloaded in position to 500 lbs. tension by use of shitns. It s tnaxitnutn pressure is 4000 lbs. when fully cotnpressed.
NOTE: When old style valves, sleeves and catns
WD
&
WD-45
73 are used as on pUtnpS prior to 37852, this pressure is 3000 lbs.
These figures are drawbar pounds pull required to cotnpress spring. The spring is thus used to tneasure drawbar pounds pull.
Movetnent of the drawbar is transtnitted throu.gh the link rod to the pUtnp, where it controls the position of the control valves. The link rod is adjusted when the drawbar is in a free position
(without load) and the draft control lever is locked to housing. The rod is adjusted until it has 1/32" clearance between pin and end of slot.
1£ the link rod is too long it will cause erratic draft control and if too short tnay break linkage.
Compiled and Reproduced From Original by Jensales Inc.
