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SUPPLEMENT WPT and WRT TRUCKS SERIAL NO. 307416 and Higher (S109)

Discover essential information and updates about DP supplement for WPT and WRT trucks with serial numbers 307416 and higher (S109), providing valuable insights and knowledge for users.

Written by Nash Bernardo

Updated at July 29th, 2025

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    WPT 40·60
    WRT 40·60

    SUPPLEMENT
    WPT and WRT
    SERIAL NO. 307416 and Higher

    1.GENERAL
    This supplement describes the new version of the WPT and WRT trucks serial number 307416 and Higher. Only illustrations affected by this change are included in this supplement. Parts list information includes all changed part numbers. Refer to the basic manual for all other parts information.
    2. LOAD AND BACKREST ASSEMBLY
    Part number 504372 is the complete assembly for standard straddle trucks and 504379 for narrow straddle and includes all parts shown in figure 1. Part number 504370 for standard straddle and 504352 for narrow straddle are only the weldment with all other parts removed. Use the charts in the parts list for figure 1 to identify the correct Dash No. for the fork assembly, fork and backrest weldment and pull rod assembly. The correct Dash No. depends on the fork length as indicated.


    Figure 1. Backrest/Fork Assembly


    INDEX NO.

    PART NO.

    PART NAME

    NO. REQD.

     

    504372*

    Backrest/Fork Assembly (See Chart 1)

    1

     

    504379†

    Backrest/Fork Assembly (See Chart 2)

    2

    1

    504370*

    Fork and Backrest Weldment (See Chart 1)

    1

     

    504352*

    Fork and Backrest Weldment (See Chart 2)

    2

    2

    059645

    Nut, Lock 5/8-18 UNF

    6

    3

    077115

    Thrust Washer

    10

    4

    503955-01

    Roller Assembly

    6

    5

    401503

    Shoulder Bolt

    6

    6

    503963††

    Load Wheel and Housing Assembly

    2

    6

    504105†

    Load Wheel and Housing Assembly

    2

    7

    800229††

    Load Wheel Housing

    1

    7

    800249†

    Load Wheel Housing

    1

    8

    061010

    Roll Pin, ¼ X 1-3/4

    1

    9

    052941-01

    Bearing

    2

    10

    401506††

    Shaft, Load Wheel

    1

    10

    401714†

    Shaft, Load Wheel

    1

    10A

    401713†

    Spacer

    1

    11

    051225

    Bearing Set

    2

    12

    078264††

    Load Wheel

    2

    12

    078267†

    Load Wheel

    2

    13

    059130

    Locknut, Hex., Thin 7/8-14 UNF-3B

    2

    14

    401496

    Shaft 

    2

    15

    503955-02

    Roller Assembly

    4

    16

    061719

    Snap Ring, Ext. ¾

    4

    17

    503957-02

    Clevis Assembly

    2

    18

    061008††

    Roll Pin, ¼ X 1-1/2

    4

    18

    06100†

    Roll Pin, ¼ X 1-1/4

    1

    19

    059452

    Nut, 7/8-14 UNF, Left Hand Thread

    2

    20

    504376*††

    Pull Rod (See Chart 1)

    2

     

    504376†

    Pull Rod (See Chart 2)

    2

    21

    075084††

    Spring, Extension

    2

    21

    075084†

    Spring, Extension

    2

    22

    059451

    Nut, 7/8-14 UNF, Right Hand Thread

    6

    23

    401399

    Plate, Spring

    2

    23

    401707†

    Bracket

    2

    23a

    401708

    Nut, Spring Retainer

    2

    24

    077221

    Lock Washer, 7/8 Split

    4

    25

    025702

    Grease Fitting

    4

    26

    401504

    Shaft

    2

    27

    061006

    Roll Pin, ¼ X 1-1/4

    4

    28

    025704

    Grease Fitting 

    6

    29

    503958

    Pull Link Assembly

    2

    30

    800232

    Pull Link

    1

    INDEX NO.

    PART NO.

    PART NAME

    NO. REQD.

    31

    052941-01

    Bearing, Sleeve

    2

    32

    401505

    Pin, Roller, 0.625 OD X 3-3/8

    2

    33

    025701††

    Grease Fitting, 90°

    2

    33

    025704†

    Grease Fitting

    2

    34

    503962††

    Roller Assembly

    2

    34

    504356†

    Roller Assembly

    2

    35

    060974

    Roll Pin, 3/16 X 1-1/4

    2

    36

    401497††

    Shaft, Pivot

    4

    36

    401710†

    Shaft

    4

    37

    075077

    Spring, Compression

    2

    38

    057614

    Spring Guide, Tube 

    2

    ---

    500166

    Roller Bearing Assy

    4

    39

    243401

    Roller

    4

    40

    051145

    Bearing

    4

    41

    053012

    Rolling Spacer, 3/16 in. thick

    A/R

    41

    053013

    Rolling Spacer, 3/32 in. thick

    A/R

    42

    236001

    Spindle, 1-1/4 in. dia.

    4

    43

    503957-01

    Clevis Assembly

    2

    44

    056499

    Decal, NO RIDING

    1

    *USE APPROPRIATE PART.

    CHART 1

    FORK END ASSEMBLY

    DASH NO.

    FORK AND BACKREST WLDMNT

    DASH NO.

    PULL ROD ASSEMBLY

    DASH NO.

    LENGTH

    504372

    -01

    504370

    -01

    504376

    -01

    36

    504372

    -02

    504370

    -02

    504376

    -02

    42

    504372

    -03

    504370

    -03

    504376

    -03

    48

    504372

    -04

    504370

    -04

    504376

    -04

    50,56

    504372

    -05

    504370

    -05

    504376

    -05

    54

    504372

    -06

    504370

    -06

    504376

    -06

    60

    504372

    -01

    504370

    -07

    504376

    -05

    64

    504372

    -02

    504370

    -08

    504376

    -06

    76

    504372

    -03

    504370

    -09

    504376

    -07

    84

    CHART 2

    FORK END ASSEMBLY

    DASH NO.

    FORK AND BACKREST WLDMNT

    DASH NO.

    PULL ROD ASSEMBLY

    DASH NO.

    LENGTH

    504379

    -01

    504352

    -01

    504376

    -01

    36

    504379

    -02

    504352

    -02

    504376

    -02

    42

    504379

    -03

    504352

    -03

    504376

    -03

    48

    504379

    -04

    504352

    -04

    504376

    -05

    54

    504379

    -05

    504352

    -05

    504376

    -06

    60

    †Parts for narrow straddle assy only.

    ††Parts for standard straddle assy only.


    3. BASE AND FRAME
    The main changes to the base and frame are associated with the hydraulic compartment cover and left and right side door weldments. The changed items are shown with an asterisk on the illustration next to the Index No. The index number below refers to the index number in the basic manual, figure 3-9 for the WPT and figure 3-10 for the WRT.

    Index No

     

    3

    Part number changed to P/N 069715

    4

    Replaced with item 35 P/N 063478

    5

    Part number changed to P/N 402014 Standard and 402030 Narrow Straddle

    7

    Deleted

    12

    Part Number changed to P/N 503954

    26

    Part Number changed to P/N 056593

    27

    Part Number changed to P/N 503953

    Figure 2. Base and Frame


    4. HYDRAULIC SYSTEM
    The only change to the hydraulic system is the addition of a hex head screw and flat washer used to secure the top of the lift cylinder. These are shown with an asterisk in figure 3 and are identified as follows:

    INDEX NO.

    PART NO.

    PART NAME

    NO. REQD.

    24

    063482

    Screw, Hex, ¼-20 x 1-3/4

    2

    25

    077031

    Washer, Flat, 5/16 x ¾, 16GA

    2

    Figure 3. Hydraulic System


    *Click on link to see original document:

    https://static.helpjuice.com/helpjuice_production/uploads/upload/image/14012/3621749/1699491148321-109.pdf

    serial numbers trucks s109

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