White Fork Lift My40 My60 Parts Operation Maintenance Manual

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TABLE OF CONTENTS

CHAPTER 1. INTRODUCTION 1-1

Section I. General Description 1-1

II. Detailed Description 1-1
Specifications 1-5

CHAPTER 2. OPERATING INSTRUCTIONS 1-7

Section I. Initial Preparation for Use 1-7

II. Operating Instructions .... 1-8
III. Principles of Operation 1-10

CHAPTER 3. FIELD MAINTENANCE 1-12

Section I. Lubrication 1-12

II. Preventive Maintenance Service 1-12

CHAPTER 4. OVERHAUL (SHOP MAINTENANCE) 1-26

Section I. General 1-26

II. Removal, Disassembly, Repair and Reassembly 1-26

4-7. Battery, Clamp and Cables 1-26

4-12. Gasoline Tank, Lines and Fittings 1-26
4-16. Seat 1-26
4-21. Horn Button 1-26
4-26. Steering Gear and Drag Link 1-27
4-31. Head and Rear Lamps 1-27
4-36. Instrument Panel, Switches and Gage 1-28
4-41. Radiator, Hosp, andThermostat 1-30
4-46. Muffler 1-30
4-50. Throttle Controls 1-30
4-55. Water Pump and Fan Assembly 1-30
4-60. Generator 1-31
4-65. Starting Motor 1-32
4-70. Distributor 1-33
4-75. Voltage Regulator 1-33
4-80. Wheels 1-34
4-85. Steering Axle (MY 40) 1-34
4-90. Steering Axle (MY 60) 1-35
4-95. Brakes, Inching Mechanism, and Master Cylinders 1-36
4-99. Drive Axle and Differential 1-37
4-104. Control Levers, Control Valve and Oil Filter 1-37
4-109. Transmission Case, Converter and Pump 1-38
4-114. Transmission and Reverse Idler Shaft . 1-39
4-119. Fuel Pump and Fuel Filter 1-40
4-124. Carburetor (Gasoline) 1-40
4-129. LP-Gas Equipment 1-41
4-134. Oil Pump 1-41
4-139. Engine 1-42
4-143. Hydraulic Pump (MY 40) 1-46
4-148. Hydraulic Pump (MY 60) 1-46
4-153. Hydraulic Control Valve 1-47
4-158. Hydraulic Steering Booster 1-48
4-163. Tilt Cylinders 1-49
4-168. Lift Cylinder (Duplex) 1-49
4-173. Lift Cylinder (Simplex) 1-50
4-178. Mast and Related Parts 1-51
CHAPTER 5. REPAIR PARTS SECTION Chapter 5, page 1
Fig. 1-1.
 CHAPTER 1

INTRODUCTION

Section I. General Description

1-1. SCOPE
lift truck are made in respect to the normal direction of
1-2. This manual provides instructions on the operation travel, which is forward.
maintenance and overhaul of the MY Series Lift Trucks.
Most of the instructions apply to both the MY 40 and the 1-6. The trucks can be equipped with either a gasoline
MY 60. Where there are differences, it will be noted or LP gas engine. The MY 40 has a capacity of 4000
either in the text or the paragraph heading. pounds, the MY 60 a capacity of 6000 pounds, both at
a 24 inch load center.
1-3. It is strongly recommended that all personnel con-
cerned with the various phases of this manual have a 1-7. The lift truck is a completely self-contained vehicle;
thorough knowledge and understanding of the equipment its power train consisting of a four-cylinder gasoline engine,
and the instructions pertaining thereof, before performing a hydraulic torque converter, and a multiple disc clutch and
any procedure with the equipment. power shaft type transmission. All these assemblies are in-
tegrally mounted together, forming one compact unit, which
1-4. GENERAL DESCRIPTION in turn drives the front axle differential and the front drive
wheels. A gear-type pump, driven from the engine cam-
1-5. Due to its design and intended purpose, the equip- shaft, supplies pressure to the hydraulic system. Electrical
ment will be referred to as "lift truck" throughout this components of the lift truck utilize the current supplied
manual. Reference to either the right or left sides of the from one 12-volt battery.

Section II. Detailed Description

1-8. DETAILED DESCRIPTION 1-12. INCHING SYSTEM. The inching system is con-
trolled by the combination inching - braking pedal.
1-9. ENGINE. The engine (figure 1-2) is a four-cylinder, (figure 1-7). The pedal actuates a valve which suppiles
four-cycle gasoline or LP-Gas operated, valve-in-head a restricted pressure to the clutch. The clutch is thus
type. Its normal speed with no load is 1750 rpm. One allowed to slip, thereby delivering only partial power to
complete stroke is required for intake, compression; power, the drive wheels, with a resultant slow ground speed.
and exhaust, thereby providing one power stroke per cylin-
der for each two revolutions of the crankshaft. 1-13. DIFFERENTIAL AND DRIVE AXLE. See figure
1-2. Coupled to, and driven by the transmission pinion
1-10. TORQUE CONVERTER. The torque converter shaft (output), is the conventional type automotive
(2, figure 1-2) is a compact, complete, sealed unit con- differential. The assembly is provided with an internal
sisting of an impeller, turbine, and single-stage stator. gear reduction at the axle end, which forms an offset in
The charging pump is coupled to the engine flywheel the axle and allows a lower center of gravity for the lift
through the impeller hub. The oil from the pump charges truck. A common lubricant is used for the transuil*an„
the converter, and the torque is multiplied by the stator. differential, and axles. n"
The turbine is splined to the input shaft in the transmission.
1-14. STEER AXLE. The rear e ',ne lift truck is
supported by a heavy-duty axle casting which embodies
1-11. TRANSMISSION. The transmission (figure 1-2) the conventional wheel spindles, steering arms, tie rods,
is a power shaft gear box equipped with two pairs of and drag link which in turn is connected to the hydraulic
hydraulically actuated multiple disc clutches. One set steering booster.
of clutches is mounted on the input shaft and controls
the forward and reverse movement of the lift truck. 1-15. HYDRAULIC SYSTEM. The hydraulic tank is an
The other set is mounted on the output shaft, and deter- integral part of the main frame, on the right hand side.
mines either high or , low range. The control valve re- A gear type pump draws fluid from the tank, to a control
ceives pressure from an engine-driven hydraulic pump valve, and to the hydraulic steering booster. Fluid under
mounted on the transmission cover. The valve is con- pressure is available on demand at each of these compon-
trolled by the hand levers mounted on the steering column. ents when the engine is running. Return lines complete
An "inching" valve, incorporated into the control valve the circuit when the cylinders or booster are not in use.
supplies only partial pressure to the clutches, when it is Extra valves are available for operating attachments. The
activated by the inching pedal. This feature provides system is controlled by hand levers located conveniently
very slow ground speeds at full engine speed. to the right of the operator.

1-1
 Fig. 1-2. Power Train

1. Engine 3. Transmission
2. Torque converter 4. Differential

1-16. HYDRAULIC STEERING SYSTEM. Steering of the 1-19. SERVICE AND PARKING BRAKES.
lift truck is accomplished by an 18-inch diameter steering
wheel, which is mounted on an automotive-type steering a. The heavy duty type service brake uses two identical
column. A hydraulic steering booster is incorporated into brake shoes which are anchored against individual anchor
tke drag link. As the steering wheel is turned, a valve in pins mounted in a spider fastened to the axle. Individual
, he booster opens, and hydraulic pressure from the hy- shoe return springs, each hooked between an anchor pin
' Clraulic system assists in turning the rear wheels. and the underside of its shoe table, hold the shoes anchored.
A brake backing plate, mounted behind the spider, supports
1-17. ELECTRICAL SYSTEM. The electrical system con- the brake wheel cylinder and provides three shoe support pads
sists of a 12-volt battery, generator, voltage regulator, for each shoe against which the shoes rest. Shoes are loosely
starter, coil, and distributor. The battery is the basic held on the backing plate by hold -down pins and spring
"f electrical current; the generator maintains the clips, two being used on the secondary shoe, one on the
batter) barged condition; and the voltage regulator primary shoe. Opposite the anchor, brake shoes are linked
governs , f voltage output into the electrical by a floating star wheel adjuster and a single retracting
system. Head al :ughts are available as optional spring hooked between the shoe ribs so that it engages and
equipment. locks the star wheel. The star wheel is reached through a
slot in the backing plate and is used to expand the shoes
1-18. LIFT AND TILT ASSEMBLY. The lift and tilt as required to adjust lining clearance. The star wheel link
assembly consists of an upright forks, a lift cylinder, and causes the shoes to function as a single compound unit. In
two tilt cylinders. The lift and tilt mechanism is con- operation, one shoe, depending upon drum rotation, leaves
trolled by hand levers located at the right of the opera- its anchor. (The "primary" shoe is dragged from its anchor
tor's seat. The truck is capable of lifting its rated load by forward drum rotation while the "secondary" shoe re-
from ground level up to a specified height, depending on mains anchored. In reverse drum rotation, the "secondary"
the mast assembly on the truck. The upright can be shoe is the one leaving the anchor.)
tilted from 6" forward of vertical to 12 ° aft of vertical
(other degrees of tilt optional). A restrictor valve in b. The same brake shoes are utilized in a cable operated
the system provides that the load will not drop at a rate of parking brake. A toggle lever, pinned to the rib of the
more than 80 feet per minute in case of hydraulic failure secondary shoe, engages a connecting link, pinned to the
or damage to the lines. primary shoe rib. The parking brake cable is connected

1-2
 LIFT SYSTEM RELIEF (MY 40) 1250 PSI
LIFT SYSTEM RELIEF (MY 60) 1750 PSI
POWER STEERING RELIEF (BOTH) 1250 PSI
TILT CYLINDER

1•1 CONTROL
TO
VALVE

PRESSURE
CHECK POINTS
OA
TANK

rr
ISO
SUCTION
STRAINER
I=1
TILT CYLINDER
L I FT CY LI NDE R

TO
TANK

TO TANK (SIMPLEX ONLY)

413:e}
-

PUMP
OUT

STEERING
CYLINDER

Fig. 1-3. Hydraulic Flow Diagram

at the opposite end of the toggle lever. When the cable 1-22. COOLING SYSTEM. Cooling of the engine is
is pulled taut, movement of the toggle lever on its fulcrum accomplished by an 18-inch, six -bladed pusher type fan
pin causes the connecting link to expand the shoes into the (3, figure 1-18) and a water circulating pressure system
brake drum. radiator. The bottom portion of the radiator is designed
with coils to cool the torque converter fluid.
1-20. FUEL SYSTEM (GASOLINE). A 16-gallon gas-
oline fuel tank is an integral part of the frame on the 1-23. EXHAUST SYSTEM. Engine exhaust vapors are
left hand side. It contains a "protected" safety filler vented out of the exhaust manifold on the upper left side
cap. The fuel suction line originates at the inside of the engine, down through a muffler and out of a tail
bottom of the tank and emerges at the upper right hand pipe at the rear of the lift truck.
corner of the tank, thereby preventing loss of fuel should
a fuel line be broken. A plug is provided at the tank 1-24. SERVICING ACCESSIBILITY. See figure 1-4.
bottom for fuel drainage and cleaning. A fuel shut-off Raising the appropriate hood section and propping it open
valve is installed in the flexible hose leading from the with the support rod provides easy access for servicing the
tank to the fuel pump. battery, air cleaner, generator, starter, distributor, spark
plugs, fan belt, engine and transmission oil supplies, fil-
1-21. FUEL SYSTEM (LP-GAS). The LP-Gas system ters, and dipsticks. The radiator and fuel tank are
consists of a replaceable tank (33-1/2 pound capacity), services externally. The hydraulic tank fill tube is
a filter, a converter, and the carburetor. The fuel is located under the right hand hood section.
confined in the tank as a. liquid under pressure. When
the valve is opened, the liquid passes to the converter 1-25. WHEELS AND TIRES. The brake drums for the
where it is changed into a gas, and then is metered to drive wheels are included in the wheel centers. Tire
the carburetor. pressures are given in paragraph 2-9.

1-3
 1-26. SEAT. See figure 1-5. The seat is adjustable for-
ward and backward. The release handle is located on the
right side of the seat frame.

Fig. 1-5. Seat

Release handle
Fig. 1-4. Servicing Accessibility

1-4
 ENGINE SPECIFICATIONS:

Make MOL I NE
Bore and stroke 3-3/4 x 5 in.
Number of cylinders 4
Displacement 220 cu. in.
Ft./lb. torque 1800 rpm 170
Ft. /lb. torque peak @ 1200 rpm 189
CRANKSHAFT
Material drop forged steel, heat treated
Bearings 3 precision
Front and intermediate 2-3/4 in. dia. x 1-5/8 in.
Rear 3 in. dia. x 2-3/16 in.
CYLINDERS AND HEADS
Cast in pairs
Material special alloy cast iron
CONNECTING RODS
Style Drop-forged steel, heat-treated section
Bearings 2-5/8 in. x 1-1/4 in.
PISTONS Aluminum Alloy
Rings 4
Compression two 3/32 in. wide
Oil two 5/32 in. wide
PINS full floating
Bearing (in rod) 1 in. x 1-3/8 in.
CAMSHAFT
Number of bearings 3
Drive Helical gears
VALVES AND VALVE MECHANISM in head
Tappets barrel ported
Intake valves alloy steel, 1-1/4 in. dia.
Exhaust valves alloy steel, 1-11/64 in. dia. port.
Exhaust valve seat inserts stellite
IGNITION
Gas and LP gas 1 12-volt battery
Spark Plugs 18 mm
Generator capacity 20 amps
Regulator capacity 20 amps
LUBRICATION Pressure points to rod, main and camshaft bearings,
timing gears, valve mechanism
Pump gear
Location submerged in sump
Capacity 6 gpm at 30 psi
Filter full flow with replaceable spin-on element
Crankcase capacity 7 qts.
Oil level gauge bayonet
Pressure gauge ..... on instrument panel
COOLING SYSTEM
Pump centrifugal V-belt drive
Capacity 40 gpm at 1800 rpm
Fan 18 in. dia--6 blade
Radiator capacity 5-1/2 gals.
Core flat tube and fin type

1 -5


DIMENSIONS AND
SPECIFICATIONS
MY 40 MY 60

Capacity @ 24 in. load center 4000 lbs. 6000 lbs.

Inch pound rating 176, 000 264, 000
Free lift 12-1/2 in. Simplex 18-3/4 in. Simplex
64 in. Duplex 60 in. Duplex
Weight - -service 8340 lbs. 9850 lbs.
Tilt 6° forward optional 8 g forward optional 8° forward
optional 0 forward optional 0° forward
Tilt 12° back optional 10° back optional 10 back
Length less forks 95 in. 112 in.
Width--single drive tires 45 in. 53 in.
dual drive tires 60-1/2 in. 69 in.
Wheelbase 56 in. 72 in.
Underclearance - -mast 5 in. 5 in.
center 8-1/2 in. 7-5/8 in.
Turning Radius outside 85 in. 98 in.
Turning Radius inside 11 in. 13 in.
Turns in intersecting aisles 72 in. 89 in.
Engine bhp (Sea level calculated) @ 1800 rpm 58 58
Speeds (MPH) High Range Row Range High Range Low Range
Forward 0 - 11.5 0 - 6.8 0-12 0 - 7.5
Reverse 0 - 11.5 0 - 6.8 0-12 0 - 7.5
Speed of lift--loaded 60 fpm 58 fpm
Fuel capacity 16 gals. 18 gals.
Protectoseal gas cap ' standard standard
LP gas (optional) 33-1/2 lbs. 33-1/2 lbs.
Tires - -Steer • • • • 6:00 x 9 x 10 ply 7:50 x 10 x 10 ply
Single drive (Standard) 7:50 x 15 x 12 ply 8:25 x 15 x 12 ply
Dual drive (Optional) 7:50 x 15 x 10 ply 7:50 x 15 x 10 ply
NOTAT (Optional) laminated rubber laminated rubber
Tread- -steer 36 in. 42-3/16 in.
single drive • 36-1/2 in. 43-1/2 in.
Standard fork length . 42 in. 42 in.
Center of drive axle to face of forks 19-1/2 in. 20-1/2 in.
Carriage- -standard (ITA) • • • • • • • . 44 in. 48 in.
Carriage--extra wide (optional) . 60 in. 72 in.

1-6
White Fork Lift My40 My60 Parts Operation Maintenance Manual
Full download: http://manualplace.com/download/white-fork-lift-my40-my60-parts-operation-maintenance-manual/

CHAPTER 2

OPERATING INSTRUCTIONS

Section I. Initial Preparation For Use

2-1. SERVICE UPON DELIVERY. c. Give the battery a booster charge after it has been
filled and dated. Fast charge for at least 10 minutes at
a. UNLOADING. Since the lift truck may be shipped the rate of 30 to 40 amps; or slow charge for at least 30
from the factory in a number of ways, no attempt will minutes at 10 amps. See paragraphs 3-7, 3-8, and 3-9
be made to cover all methods of unloading procedures. for battery service procedures and data.
The trucks were shipped from the factory in accordance d. If any electrolyte spilled on the battery, flush it off
with standard shipping procedures, and should be unloaded with clean water. Dry the battery before installing.
from their carriers in a safe, logical manner.

2-2. REMOVAL OF PROTECTIVE MATERIALS AND

DISASSEMBLED COMPONENTS. Remove any protective
tape or padding from the lighting components of the lift
truck. Remove any components that have been packaged
separately and attached to or shipped with the lift truck;
refer to the Table of Contents and note the page number
on which that component is listed. Install the component
accordingly.

2-3. VISUAL INSPECTION FOR SHIPPING DAMAGE.

Although every attempt has been made at the factory
to protect the equipment against damage during ship-
ment, it is possible for some damage to be incurred. It
is necessary, therefore, that a careful, visual inspection
be made of the lift truck upon delivery and before placing
it in operation. It is further recommended that a written
record be maintained which outlines the nature of the Fig. 1-6. Battery
damage, and the urgency required in its correction.

2-4. SERVICE PRIOR TO USE. The following procedures e. The battery has a negative ground. Install it with
are to be accomplished before operation of the lift truck: the negative terminal toward the front of the truck.
Install the clamp and cables.
2-5. BATTERY.
2-6. ELECTRICAL SYSTEM. Inspect wiring and con-
a. The battery is shipped without electrolyte. Raise nections. Actuate light switch and inspect the lights for
the left hand section of the hood, remove the battery proper response. Place ignition switch "ON" and test for
from the lift truck, and discard any vent plug seals.
electrical current to that component. With switcl% -
Fill all cells to the proper level with electrolyte. Allow test horn.
the battery to stand for about 20 minutes after filling.
2-7. FUEL SYSTEM (GASOLINE). Open the fill cover
WARNING of the fuel tank located on the left side of the lift truck;
fill as necessary with a good grade of regular gasoline.
Electrolyte can burn or damage the eyes, Close the tank cover, and padlock if desired. Wipe the
skin, or clothing. Wear safety glasses to tank free of dirt or fuel hose leakage, and inspect fuel
prevent damage to the eyes due to splashed
line and engine-mounted accessories for signs of fuel
electrolyte. If electrolyte is spilled on the
leakage at their connections. Open shut-off valve located
skin or clothing, flush off immediately with on fuel tank-to-fuel pump line.
a solution of baking soda and water, or some
other neutralizing agent, then flush off with 2-8. FUEL SYSTEM (LP-GAS). Open the valve on the
.
clean water. fuel supply tank. Check all connections in the fuel line
for evidence of leaks. A leak will result in a formation
b. Code date the battery according to the month and of frost at the point of the leak.
year. Stamp the code on the intercell connector nearest
the negative terminal of the battery. The first number 2-9. WHEELS AND TIRES., Inflate front tires to 85
of the code indicates the month (1-January, 2-February, pounds and rear tires to 80 pounds pressure. Inspect
etc.), and the second number indicates the year (1-1961, tires very closely for nails, glass, or any other foreign
2-1962, etc.). particles that may impair tire life.

1-7

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