FIFTH REBUILD AND REPAIR

PROCEDURES

WHEELS
RK-351-03505 for FW35-03344 Series and XA-351-03505 Series Top Plates
RK-351-UB for XA-351-UB Elevating Fifth Wheel Top Plates
RK-09063 and RK-351-08332-1 for Fifth Wheels and Top Plates listed above

This manual contains the installation procedures for FIGURE 1

Holland rebuild kits RK-351-03505 (-3 and -4) and
RK-351-UB. Before rebuilding, verify that you have
the correct rebuild kit for the fifth wheel top plate
you are attempting to rebuild. The fifth wheel part
number tag is located on the side of the fifth wheel
“pick-up” ramp (SEE FIGURE 1). Part and Serial No. Tag

XA-351-03505 XA-351-UB

Use the following Rebuild Kits for these Use the following Rebuild Kits for these
XA-351-03505 Series Fifth Wheels: XA-351-UB Series Fifth Wheels:
Rebuild Kit Fifth Wheel/Top Plate Rebuild Kit Fifth Wheel/Top Plate
RK-351-03505..........FW35-03344, (-1, -2, -3, -6, -7, -8) RK-351-UB ...............FW69-12B
XA-351-03505, XA-351-03505-2 XA-351-UB
RK-351-03505-3.......FW35-03344-4 (-9, -10) FW67-16B (-2, -3, -6)
XA-351-03505-3 FW68-16 (-2)
RK-351-03505-4.......FW35-03344-5
XA-351-03505-4

IMPORTANT SAFETY INSTRUCTIONS

Before attempting any repair procedures you must • DO NOT modify, change, or add to the
read and understand the following: product. Use only genuine Holland parts.
• All fifth wheel maintenance must be performed • Perform all procedures in a lighted area
by a qualified service technician using proper clear of obstacles and other personnel.
tools and safe procedures. Follow the instruc- • Always wear safety goggles during
tions contained in this manual. service procedures.
• Observe standard precautions when lifting.

XL-FW339-04 1
XA-351-03505 AND XA-351-UB PARTS BREAKDOWN
Air Cylinder Table 9
Top Plate Assembly Air Cylinder Components
5
XA-351-03505 .......................................Items 20 and 22A 38
XA-351-03505-2 ....................................Items 20 and 22A
6
XA-351-03505-3 ....................................Item 22C, omit item 20 11
XA-351-03505-4 ....................................Items 20 and 22B 7
XA-351-UB .............................................Items 20 and 22A
8
Bracket Components Accessories (not included) 20
XA-351-03505 Series 12
ONLY (not included) 33
(RK-04413-1) 16 10
12
30
12
31
32 34 14
(2 of each required) 17 25

Bracket Components 18 22A

XA-351-UB Series 13 22B
ONLY (not included) XA-351-03505 22
Series ONLY 19 22C
35 21
28

27 15 XA-351-UB Series top

37
36
plates have threaded
28 inserts welded on the
inside of the pocket ear
(2 of each required) 39

ITEM NO. 10
NO. PART NO. REQ'D. PART NAME
23
•1 XA-07292-T 2 Lock pin
•2 XB-5 2 Cotter pin (1/4˝ x 2˝)
•3 XA-08332-1 1 Lock jaw set
•4 XB-07628 1 Extension spring 26
>5 XB-10035 1 Hex head cap screw 5/8˝-18 x 2˝ 25 24
>6 XB-07431 1 Washer 5/8˝I.D. x 2 5⁄8˝O.D. x 3⁄4˝ thick
>7 XA-1507-1 1 Roller 5/8˝ I.D.
>8 XA-08988 1 Cam plate 40
9 XB-2083 1 Hex head cap screw 1/2˝-20 x 13⁄4˝ (Use as needed)

> 10 XB-08559 2 Washer 1/2˝ I.D. x 13 ⁄ 4 ˝ O.D.

11 XA-1029 1 Roller 1/2˝ ID 29
29
> 12 XB-T-69-A 3 Locknut 1/2˝-20 (2 add’l req. for brackets)
13 XB-1505 1 Yoke spring
> 14 XA-1706-1 1 Yoke shaft
15 XA-07295 1 Yoke
> 16 XA-09040 1 Cam spacer
17 XB-2149 1 Torsion spring
18 XB-21-S-500-2750 1 Roll pin 1/2˝ x 23⁄4˝
19 XA-3528 1 Secondary lock
20 XB-698 1 45° street elbow
> 21 XB-T-89-5 2 HHCS 1/2˝-20 x 13⁄4˝ LG.
22A* XA-2524-R-13-1 1 Air cylinder
22B* XA-2524-R-13-2 1 Air cylinder 4
22C* XA-2524-R-13-3 1 Air cylinder
23 XA-3546 1 Secondary lock handle
> 24 XA-09041 1 Release handle
> 25 XB-PW-1732-1-116 2 Washer 1/2˝ I.D. x 1˝ O.D. 2
> 26 XB-07291 1 Compression spring
27** XA-03423 2 Bracket bearing 1 3 1
28** XA-0268 4 Bearing stop block
2
29 XB-H-38 2 Grease fitting
30*** XA-2016 2 Bracket pin
> 31*** XB-21-S-375-1750 2 Roll pin 3/8˝ x 13⁄4˝
32*** XB-0011 2 Rubber bushing
All parts listed are included in RK-351-03505 and RK-351-UB,
33*** TF-0110 1 Kingpin gage
except items 39 and 40 and as listed below:
34*** TF-TLN-5001 1 Kingpin lock tester
35*** XB-BR-118-C-7 2 HHCS 11⁄8˝-7 x 7˝ • Parts included in RK-351-08332-1
36*** XB-E-536 2 Washer, lock 11⁄8˝ > Parts included in RK-09063
37*** XB-1604-5 2 Rubber Bushing * See Air Cylinder Table above for proper
> 38 XB-1030 1 Washer 1/2˝ I.D. x 2 1 ⁄ 4 ˝ O.D. air cylinder components.
> 39 XA-09043 1 Yoke stop
** Included in RK-351-03505 ONLY.
> 40 XA-09039 1 Handle guide
> 41 XB-02967 1 Never-Seez (not shown) *** Not included in repair kits, except where noted.

2 XL-FW339-04
 REBUILD PROCEDURES

BRACKET BEARING INSPECTION PRIOR TO ASSEMBLY

RK-351-03505 Only Check the casting for the following:
In extremely abusive environments,
1. If the casting has a 2˝ slotted handle hole, a
the hardened steel bracket bearing handle guide must be used (not required for
(ITEM 27) may wear to the extent a 11/4˝ long slotted handle hole). Remove the
that removal and replacement is handle guide washer (if present).
necessary. Before removing the fifth
wheel from its mounting brackets,
you should determine if it will be necessary to
remove and replace the existing bearings.
2˝

Determine if removal and replacement is

necessary by prying up on each pivot ear using REMOVE WASHER BY GRINDING
a small bar. If, when pried up, more than 1/2˝
vertical movement is noted (see Figure below) 2. Position the NEW handle guide (Item 40) on the
removal and replacement should be considered. inside rib of the fifth wheel and weld it in
place, as shown.
1/2˝ Max. (Measured at ear) NOTE: The handle guide (Item 40) has a
11/4˝ diameter, a 1/4˝ thick wall,
and is 1/2˝ thick.
40 HANDLE GUIDE

PUSH DOWN TACK

WELD 4
PLACES
For bracket bearing removal and replacement
procedures, see Bracket Bearing Replacement,
page ? in this manual.

11/8˝
DISASSEMBLY AND INSPECTION
1. Remove the fifth wheel from the tractor. VIEW FROM ABOVE SIDE VIEW

2. Place fifth wheel upside down on a flat 40 HANDLE GUIDE

working surface. 11/4˝ DO NOT USE
THE WHITE
3. Remove the parts you are replacing.
CAM ROLLER
DISCARD ALL REMOVED COMPONENTS! (ITEM 7) AS A
DO NOT RE-USE ANY PARTS! SUBSTITUTE
4. Thoroughly steam clean the top plate. FOR THE
HANDLE GUIDE.
5. Inspect the top plate for cracks, damage, 1
/4˝ /2˝
1

distortion, and loose lock pin holes.

Fifth wheels with cracks, damage, distortion or IMPORTANT: When welding, use a procedure and
loose lock pin holes must be replaced. filler metal which assures a sound,
good quality weld which protects
Do not attempt to repair the welding operator and others.
or rebuild if the top plate Overwelding may cause distortion
is cracked, damaged or distorted, or if the or damage and underwelding may
lock pins do not fit tightly in the top plate. not develop sufficient strength.
The fifth wheel may not operate properly An AWS E70XX or E6OXX filler
and this may result in trailer separation. metal, used in conjunction with
either GMAW (gas shielded solid
wire), FCAW(gas shielded flux core
wire) or SMAW(AC or DC stick)
is recommended.

XL-FW339-04 3
PRIOR TO ASSEMBLY continued REASSEMBLY
3. Measure the distance between the yoke stop Lock Installation
block and the centerline of the lock pins as
1. Lubricate the lock pin holes of the lock jaws
shown below.
(ITEM 3) with Never-Seez (provided in kit).
If the distance is 33/4˝, the yoke stop location is DO NOT SUBSTITUTE.
correct. Proceed to “Reassembly”.
YOKE STOP BLOCK Thoroughly lubricate
holes with Never-Seez

33/4˝

MEASURED
FROM THE
HORIZONTAL 2. Align the lock jaws (ITEM 3) in the casting,
CENTERLINE OF as shown.
THE LOCK PINS
TO THE TOP OF
YOKE STOP BLOCK

4. If the distance is 31/2˝ or less, you must tack

weld a new yoke stop (Item 39) in front of the
existing stop as shown below. Center the stop
side-to-side and flush with the existing stop so With fifth wheel
that it adds an additional 5/16˝ thickness. upside down,
39 position lock 3
SPACER BLOCK jaws so that
TACK WELD
2 PLACES
kingpin guides
are facing up,
KINGPIN
away from the GUIDE
UP
casting face,
5
/16˝
as shown.
33/4˝

MEASURED
FROM THE 3. Align the holes in the lock pins (ITEM 1) so that
HORIZONTAL cotter pins can be inserted, as shown.
CENTERLINE OF
THE LOCK PINS 4. Drive pins
TO THE TOP OF
YOKE STOP BLOCK
into casting 2
until heads
are flush
with cast-
ing.
5. Insert
cotter pins 2
(ITEM 2)
and spread.

1
1

4 XL-FW339-04
 REASSEMBLY continued
Yoke Installation Cam Plate Installation
1. Lubricate the tips fo INSTALL WITH
1. In this order, slide the 1˝ O.D. washer (ITEM
THREADED HOLE
the yoke with a light FACING UP 25), 1˝ handle spring (ITEM 26) and second
grease, as shown. 13/4˝ O.D. washer (ITEM 10) onto the release
15
handle rod (ITEM 24), as shown below.
2. Next, slide the straight end of the release
handle rod (ITEM 25) through the inside of
casting hole “B”, or handle guide, as shown
LUBRICATE YOKE
TIPS WITH
below.
LIGHT GREASE 10 26 25 24
CASTING
HOLE “B”
2. With the threaded hole facing up, slide the
yoke (Item 15) into the casting. Tap lightly to
seat the yoke around the locks.
15

3. Insert the “S” bend of the release handle

rod (ITEM 24) into the hole in the cam plate
(ITEM 8), as shown below.

3. Install the lock

4
spring (Item 4)
as shown.
24

4. Position the cam CAM PLATE

plate pivot hole PIVOT HOLE
over the casting
lug, as shown.
4. Install yoke spring (ITEM 13), as shown below. Slide a 13/4˝ O.D.
8
washer (ITEM 10)
5. Next, slide the yoke shaft between the
(Item 14) into the cam plate
14
casting, (ITEM 8) and
through the 10
the casting lug
spring and Align the
holes with the
into the yoke. rounded side
Align the of the washer
recessed hole 13 facing the
in the shaft cam plate. CAM PLATE
with the ATTACHMENT
threaded hole LUG
in the yoke.

continued

XL-FW339-04 5
REASSEMBLY continued
Cam Plate Installation continued 12. Install the 5/8˝ bolt (ITEM 5) through the
washers, roller and cam plate and into
NOTE: When
the threaded hole in the yoke.
installing washers
Make sure that the bolt enters the recessed hole
(ITEMS 6, 10, and 38),
in the yoke shaft, as shown.
the rounded edge of CAM PLATE
.06˝ MIN. GAP
the washers must .120˝ MAX. GAP
always face the
cam plate.

5. Install the 1/2˝ I.D.

roller (ITEM 11) into 9
the cam plate and
place a 21/4˝ O.D. 39 YOKE BOLT MUST BOTTOM OUT
YOKE
11 IN YOKE SHAFT
washer (ITEM 38) 8 SHAFT
on top of the roller
with the rounded
13. Tighten the bolt securely. Make sure the gap
side facing the
between the washer and the cam plate is no
cam plate. more than .120˝ and no less than .06˝, then
10
6. Install the 1/2˝ bolt check for free movement of the cam plate.
(ITEM 9) through the
washers, roller and Secondary Lock Installation
top plate lug. 12 1. Pass the “S” bend of the manual secondary
CAM PLATE release handle (ITEM 23) through the casting
7. Secure the bolt with ATTACHMENT
a 1/2˝ nut (ITEM 12). guide hole, as shown below.
LUG
Tighten securely. Then check for free movement
of the cam plate.
8. Next, align the cam plate track over the
threaded hole in the yoke (see figure below). 24

9. Slide the 2 5/8˝ O.D. x 3/8˝ thick spacer (ITEM 16)

between the yoke and the cam plate. 19

10. Place a 5/8˝ I.D. roller (ITEM 7) into the cam

2. Pass the “S” bend of the release handle
plate track, then place the 2 5/8˝ O.D. washer
through the large hole in the secondary lock
(ITEM 6) over the roller with the rounded side (ITEM 19), as shown.
of the washer facing the cam plate.
Start the roll pin (ITEM 18) into the hole in the
top plate opposite the cam attachment bolt.
5
START PIN, POSITION CAM
LOCK, THEN DRIVE PIN ATTACHMENT BOLT
6

7 18
CAM PLATE
TRACK
8
17
19
16
HOLE IN
YOKE MUST
BE ALIGNED THE FLATS OF THE SPRING MUST
THREADED REST AGAINST THE CASTING
WITH HOLE
HOLE IN
IN SHAFT
YOKE
Assemble the secondary lock (ITEM 19) to
the torsion spring (ITEM 17), as shown above.
Drive the roll pin (ITEM 18) through the spring
11. Check the alignment of the recessed hole and lock until flush with the casting.
in the yoke shaft. Check the lock spring for tension and lock for
free movement.
6 XL-FW339-04
REASSEMBLY continued

Air Cylinder Installation Bracket Bearing Replacement

1. Insert the 45° fitting (ITEM 20) into the hole RK-351-03505 Only
in the end of the air cylinder (ITEM 22) and 1. Grind off the existing bearing block stops (ITEM
position it so that the open end of the fitting 28) using care not to remove material from the
will face the tractor cab when the fifth wheel fifth wheel top plate casting.
is installed.
2. Remove the existing bracket bearing (ITEM 27)
2. Position the clevis on the rod end of the air and discard all old parts.
cylinder over the hole in the cam plate tab
(see figure below). 3. Position the new bracket bearing in fifth wheel
bracket “pocket” area.
3. Position the clevis on the fixed end of the air
cylinder over the mounting tab on the fifth 4. Position the new bearing stop blocks
wheel casting rib (see figure below). (ITEM 28), as shown below, and weld in place
4. Place a 1˝ O.D. washer (ITEM 25) between the using a continuous 3/16˝ fillet weld.
cam plate and the air cylinder clevis, as shown
below. Then, secure the air cylinder using the 28
socket head shoulder bolts (ITEM 21) and
flange nuts (ITEM 12), as shown.
27
NOTE: The bolts should be inserted so that the
bolt heads face the fifth wheel casting and the
flange nuts face outward. 28

OPEN END OF FITTING Grind off the stop block

TOWARDS CAB (when used) (ITEM 28) welds and
20 remove the bearing
22
(ITEM 27).
Secure the new bearing
by welding the new stop
blocks in place with a
continuous 3/16˝ fillet
across the outside edge
of the blocks.

Position the stop blocks

(ITEM 28) flush with the
edge of the bearing block
FIFTH WHEEL 21 (ITEM 27) as shown.
TOP PLATE BOLT
SURFACE 3/16˝

CAM PLATE AIR

CYLINDER

CAM MOUNTING
PLATE 12 TAB ON
NUT CASTING

25
WASHER IMPORTANT
When welding, use a procedure and filler metal
with a sound, good quality weld which protects
the welding operator and others. Overwelding
may cause distortion or damage and under-
welding may not develop sufficient strength.
An AWS E70XX or E60XX filler metal, used in
conjunction with either GMAW (gas shielded
solid wire), FCAW (gas shielded flux core wire)
or SMAW (AC or DC stick) is recommended.

7 XL-FW339-04
OPERATION CHECK
IMPORTANT
Before you use your fifth wheel, you must verify
that it, and the control system, are operating If the fifth wheel does not operate properly,
properly. DO NOT USE IT! Either disassemble and repeat
rebuilding procedures or contact your nearest
1. Check the air lines for signs of chafing or Holland representative for assistance. Never use
other damage, check the control valve for a fifth wheel that does not operate properly.
proper operation, and make certain the air
breather hole on the air cylinder end cap is
open. Repair as needed. ➠

Failure to properly install, operate,

or maintain this fifth wheel could
AIR BREATHER HOLE result in tractor and trailer separation causing
death or serious injury to others.

2. Reinstall fifth wheel. Reattach air line.

3. Using a Holland lock tester, close the fifth

wheel locks. Verify that the locks are properly
closed around the kingpin. Activate the fifth
wheel release switch and remove the lock tester.
Repeat this step three times to verify proper
operation.
HOLLAND LOCK TESTER

LOCKS COMPLETELY CLOSED AROUND KINGPIN

The fifth wheel is now ready for operation.

HOLLAND USA, INC.

1950 Industrial Blvd. • P.O. Box 425 • Muskegon, MI 49443-0425
Phone 888-396-6501 • Fax 800-356-3929
www.thehollandgroupinc.com

Copyright © December 2003 • The Holland Group, Inc.

Holland USA, Inc. Facilities: Holland International, Inc. Holland Hitch of Canada, Ltd. Holland Equipment, Ltd. Holland Hitch of Canada, Ltd.
Dumas, AR Warrenton, MO Holland, MI Woodstock, Ontario • Canada Norwich, Ontario • Canada Surrey, British Columbia • Canada
Holland, MI Wylie, TX Phone: 616-396-6501 Phone: 519-537-3494 Phone: 519-863-3414 Phone: 604-574-7491
Muskegon, MI Fax: 616-396-1511 Fax: 800-565-7753 Fax: 519-863-2398 Fax: 604-574-0244
Ph: 888-396-6501 Fax: 800-356-3929

8 XL-FW339-04