parts & service information k800040c

Document No. K800040 REVC 2/11/2013 PEF-19-03.1-001 of 6 ENG. DWB

Disclaimer: This bulletin release is for informational purposes only and is not factory authorization

for warranty repairs or warranty claim submission.

PRODUCT IMPROVEMENT

SUBJECT: Scissor Link Bearing Upgrade Kit

PRODUCT AFFECTED: Coal Hauler

Carrier Model Numbers: CH240C, CH220C, 200CII

Serial Numbers: ***-M067 thru ***-M113

Description: This kit replaces the scissor link center joint pin, bearings, washer and locknuts with

a heavier duty configuration. The addition of a spacer between the bearings allows the use of a

larger locknut capable of applying more force, which will hold the joint tighter and lessen the need

for adjustment or retightening.

To add the spacers necessary, a measurement must be taken from each scissor link’s bearing

spacing shoulder. Using this measurement, the final length of the spacer will be calculated during

the below procedure. The spacer provided must then be ground to the desired length, which will

determine the bearing preload applied. Please account for the final grind process of the spacers

in the scheduled downtime.

This kit is an additional upgrade over K800020. This kit contains a different, larger,

more robust locknut. The two nuts are not interchangeable.

Parts & Service Information K800040C

SCISSOR LINK

CENTER JOINT

TOP & BOTTOM

SCISSOR LINK JOINTS


1. Observe the following safety policies when installing this kit.

Position the struts to achieve the desired work height. Place the body on stands

and place chock blocks at the tires.

Before disconnecting any hoses or removing any hydraulic components, relieve

all hydraulic pressure from the affected system. Allow all hydraulic oil stored under pressure

to return to the hydraulic tank and install all appropriate lockouts.

2. The parts provided with this kit are identified in Figure 1 below.

Figure 1

226349

PIN

226356

WASHER

(2) 226358

SPACER

(4) 057277 / 057278

BEARING CUP & CONE

226348

NUT


The bearing cups and cones in this kit come prepackaged in pairs of one cup

057277 and one cone 057278 as 226357 BEARING ASSYs. Each has a dimension written on

a tag and attached. See Figure 2 below. This dimension is the Cone Face Offset for that

individual set of cup and cone, and will be used along with the scissor link shoulder

measurement to determine the spacer’s desired final ground length.

Each set of cup and cone must remain paired together during assembly or the

preload on the bearings will not be correct.

Figure 2


3. Loosen the top & bottom scissor link joints. Reference Kress Service Manual for complete

disassembly instructions.

4. Disassemble the current center pin arrangement on the truck. Pin, bearings, nut(s) and washer

can be discarded. Reference Kress Service Manual for complete disassembly instructions.

This kit supplies new bearing cups and cones. If the currently installed bearings

are to be reused, or if new bearings from customer stock are used, they must be measured for

Cone Face Offset which has already been done with the kit-supplied bearings. Contact Kress

Product Manager – Mining for the Cone Face Offset measuring procedure if other bearings are

to be used instead of the supplied set.

5. Measure the machined shoulder width of both upper and lower scissor links as shown in Figure

3 below. For reference - “DIM A” would be the measurement of the lower link (Link A) and

“DIM B” would be the measurement of the upper link (Link B).

The shoulder should measure between .490” and .510”. Shoulder measurement

must be accurate to +/- .001”.

Figure 3

LOWER LINK

“A”

UPPER LINK

“B”


6. Select two 226357 BEARING ASSYs to use in the lower link (Link A) and two to use in the

upper link (Link B). It does not matter what order they are installed in each link, but it is

important that they are specific to either the upper or lower link.

7. Add “DIM A” and the Cone Face Offsets of the two 226357 BEARING ASSYs that will be

installed in Link A. Subtract .0025” from that total to get “Length A”, or the final ground

length of the spacer that will be installed in Link A. Note: Subtracting .0025” obtains the

proper preload on the bearings. See Figure 4 below for the arrangement of the spacers between

the bearings for each link.

Example:

DIM A = .506”, Cone Face Offsets of two 226357 BEARING ASSYs are .0685” & .0680

.506” + .0685” + .0680” = .6425

Length A = .6425” - .0025”

Length A = .6400” +/-.0005”

8. Repeat Step 6 for Link B to arrive at the final ground length of the spacer that will be installed

in Link B, or “Length B”. See Figure 4 below for the arrangement of the spacers between the

bearings for each link.

9. Have 226358 SPACERs ground to Length A and Length B.

The spacers must be ground within a tolerance of +/-.0005”.

10. Reassemble components as shown in Figure 4 below. Ensure ground spacers are assembled

into the appropriate link. NOTE: The washer included with nut 226348 does not get used.

Please discard. Use only tanged washer 226356. Refer to Kress Service Manual for

remaining assembly instructions.

Align tab on 226356 WASHER with slot in 226349 PIN.

226357

BEARING ASSY

“A”

226358

SPACER

“A”

226349

PIN

226356

WASHER

226348

NUT

226357

BEARING ASSY

“B”

226358

SPACER

“B”


Figure 4

11. Bearing Locknut 226348 Installation Procedure:

A. Thread nut onto pin until snug enough to have pulled the seal halves in the middle together.

B. Rotate the pin 3X and check it is still snug, repeat until maintained

C. Lube each screw with the supplied Superbolt lubricant.

D. Using the star torque pattern shown below, torque each of the 5/16 jackscrews to 6 ft-lbs.

E. Rotate the pin 3X.

F. Using the star torque pattern shown below, torque each jackscrew to 29 ft-lb.

G. Rotate the pin 3X.

H. Using a circular pattern, torque each jackscrew to 44 ft-lb.

I. Rotate the pin 3X.

J. Using a circular pattern, torque each jackscrew to 58 ft-lb and repeat as necessary until

torque is maintained.

12. Tighten top & bottom scissor link joints using instruction from the Kress Service Manual.

If you wish to obtain this product enhancement, please contact the Kress Parts Department for

cost and availability. When placing an order, please refer to the “Kit Number” listed below.

KIT NUMBER LIST 800040 SCISSOR LINK BEARING UPGRADE KIT

KIT LIST

ITEM PART NO. QTY DESCRIPTION

1 226348 1 BEARING LOCKNUT 2.50-8UNC

2 226349 1 PIN

3 226356 1 WASHER

4 226357 4 BEARING ASSY

5 226358 2 BEARING SPACER

6 K800040 DOC SCISSOR LINK BEARING UPGRADE KIT

Please refer to the Kress Support Information Portal at www.kresscarrier.com for this and all

other PSI documents.

QUANTITIES OF THIS KIT ARE GOOD FOR ONE SCISSOR LINK JOINT

parts & service information k800040c

Documents