EXPANSION/SPLITTING OF THE STICK AS A RESULT OF WATER ENTERING THE STICK AND FREEZING DURING EXTREME COLD WEATHER CONDITIONS Caterpillar


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EXPANSION/SPLITTING OF THE STICK AS A RESULT OF WATER ENTERING THE STICK AND FREEZING DURING EXTREME COLD WEATHER CONDITIONS [TIBU3862]
HYDRAULIC SYSTEM
CYLINDER GP

CONFIDENTIAL TIBU3862-01

TECHNICAL INFORMATION BULLETIN

JULY 9, 2003

WORK TOOL

MULTI TERRAIN LOADER

SKID STEER LOADER

THIS TECHNICAL INFORMATION BULLETIN REPLACES THE MAY 21, 2003 TIB, "EXPANSION AND/OR SPLITING OF THE STICK AS A RESULT OF WATER ENTERING THE STICK AND FREEZING DURING EXTREME COLD WEATHER CONDITIONS". DESTROY THE MAY 21, 2003 TIB. IT WILL NOT APPEAR IN THE SEMI-ANNUAL INDEX.

BH27 (B2H1-545),

BH30 (B3H1-687),

BH30W (B3W1-815) SKID STEER LOADER BACKHOES

247 (CML1-UP),

257 (CMM1-UP),

267 (CMP1-UP),

277 (CNC1-UP),

287 (CNY1-UP) MULTI TERRAIN LOADERS

216 (4NZ1-UP),

226 (5FZ1-UP),

228 (6BZ1-UP),

236 (4YZ1-UP),

246 (5SZ1-UP),

248 (6LZ1-UP),

232 (CAB1-UP),

242 (CMB1-UP),

252 (FDG1-UP),

262 (CED1-UP) SKID STEER LOADERS

 

Component Code(s) 7000, 5458, 6502

SUBJECT: EXPANSION AND/OR SPLITING OF THE STICK AS A RESULT OF WATER ENTERING THE STICK AND FREEZING DURING EXTREME COLD WEATHER CONDITIONS

PROBLEM:

Reports have been received of expansion and/or splitting of the stick as a result of water entering the stick and freezing during extreme cold weather conditions. The affected stick assemblies and stick groups are listed in the following table:

Model

Group

Component

BH27

207-8474 Stick Gp

207-8475 Stick As

BH30

204-4045 Stick Gp

204-4031 Stick As

BH30W

SOLUTION:

Perform the rework procedure that follows.

Rework Procedure

The rework consists of drilling holes in the bottom plate of the stick assembly to enable water to drain from inside the body of the stick. See Figure 1 and Figure 2.

  1. Drill a 10 mm (0.4 inch) diameter hole in the chamfered portion of the bottom plate of the stick assembly. See Figure 3 for the drilling location.
  2. Drill a 10 mm (0.4 inch) diameter hole in the bottom plate of the stick assembly. See Figure 4 for the drilling location. Note: Drill through both the outer plate and the inner plate as shown in Figure 2. The distance between the two plates is approximately 10 mm (0.4 inch).

Figure 1. Side view of the stick assembly.

Figure 2. Drilling locations for drain holes

Figure 3. Layout for drilling the drain hole in the chamfered section of the bottom plate.

Figure 4. Layout for drilling the drain hole in the bottom plate. The location is 66 mm (2.5 inch) from the end of the stick assembly, as shown.

COPYRIGHT 2003 AVSpare
ALL RIGHTS RESERVED

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