GREASE LUBRICATED LINK ASSEMBLIES FOR HYDRAULIC EXCAVATORS Caterpillar

GREASE LUBRICATED LINK ASSEMBLIES FOR HYDRAULIC EXCAVATORS

Grease lubricated track link assemblies are now available in the parts system for 307, 311, 312, 315, 317, 318, 320 and 322 Hydraulic Excavators.  These link assemblies are direct replacement for the former sealed link assemblies used on these models.  Known as GLT, the new grease lubricated link assembly has two Poly-W seals in each track joint to retain the grease.  (See GLT Cross Section.)  The seal name is derived from it?s material, polyurethane, and cross sectional ?W? shape. 

The grease lubricated track link assemblies for the 315 through 322 Excavators have a larger outer bushing diameter (2mm step) for additional wear life.  The current sprocket segment can be used with the larger bushing diameter.

These improvements will provide an additional 1200 hours, or more, of undercarriage life for most Hydraulic Excavator applications.

                                                                                                                                                                                                                                                                                                                                                                     GLT Cross Section

Features and Benefits 

                        Features                                                                       Benefits

Part Numbers

The following link assembly (see Attachment II for part number consist) part numbers are available for the specified models:

            Model                         Pitch (mm) - in            Sections          Part Number

            307B                              (135.0) - 5.31                 42                   172-3290

            307B                              (154.0) - 6.01                 38                   168-6753

            311B                              (171.5) - 6.75                 41                   176-4874

            312B Standard               (171.5) - 6.75                 43                   176-4870

            312B Standard *            (171.5) ? 6.75                 43                   180-2689

            312B Long                     (171.5) - 6.75                 46                   176-4871

            312B Long **                (171.5) - 6.75                 46                   184-5859

            315B Standard               (190.5) - 7.50                 41                   194-1133

            315B Long                     (190.5) - 7.50                 44                   194-1134

            317B                              (190.5) - 7.50                 44                   194-1134

            317B Long                     (190.5) - 7.50                 45                   194-1609

            318B                              (190.5) - 7.50                 45                   194-1609

            320C Standard               (190.5) - 7.50                 45                   194-1609

            320C Long                     (190.5) - 7.50                 49                   194-1608

            322B Standard               (190.5) - 7.50                 47                   195-9343

            322B Long                     (190.5) - 7.50                 51                   195-9344

*    For machines serial number 6SW0457 & Up, and 9NW0210 & Up.

**  For machines serial number 2KW0223 &Up, and 9FS 0682 and Up.

Adaptability  

GLT link assemblies will fit earlier Hydraulic Excavators models of the same pitch size.  Also, GLT is being developed for models not listed and some are expected to be in production, later this year.

Servicing

When performing service on the grease lubricated track link assemblies (turning pin and bushing, replacing components) refer to Undercarriage Reconditioning Bulletin Media No. SEBF8598, dated February 2001.

Custom Track Service (CTS)

When performing CTS on 307B through 312B machines, refer to the 14^th Edition of the CTS handbook (Media Number PEKP9400-02).  For 315B through 322B machines with increased bushing diameter see wear chart on Attachment I.

Summary

GLT, grease lubricated, link assemblies offer a significant wear life and cost/hour advantage over comparable sealed link assemblies.

CBNewland                                                                 TCRobertson

Undercarriage Marketing Division                                 Undercarriage Marketing Division

Parts and Service Marketing                                         Parts and Service Marketing

CV4111 - Tel. (309) 675-7874                                   CV4111 - Tel. (309) 675-7879

Newland_Chuck_B@CAT.com                                   Robertson_Thomas@CAT.com

315, 317, 318, 320, 322 Excavators

Track Bushing for Greased Lubricated Track

Wear Chart

        Caliper                       Lesser                       Greater                Ultrasonic

        Inches          (mm)              % Worn                       % Worn             Inches         (mm)

2.39               60.7                     0                                  0                     0.45             11.5

2.38               60.4                     8                                  6                     0.44             11.3

2.37               60.2                    16                                12                    0.43             11.0

2.36               59.9                    24                                18                    0.42             10.8

2.35               59.7                    32                                24                    0.41             10.5

2.34               59.4                    40                                30                    0.40             10.2

2.33               59.2                    48                                36                    0.39             10.0

2.32               58.9                    56                                42                    0.38              9.7

2.31               58.7                    64                                48                    0.37              9.5

2.30               58.4                    68                                54                    0.36              9.2

2.29               58.2                    72                                58                    0.35              9.0

2.28               57.9                    76                                61                    0.34              8.7

2.27               57.7                    80                                64                    0.33              8.5

2.26               57.4                    84                                67                    0.32              8.2

2.25               57.1                    88                                70                    0.31              8.0

2.24               56.9                    92                                73                    0.30              7.7

2.23               56.6                    96                                76                    0.29              7.5

2.22               56.4                   100                               79                    0.28              7.2

2.21               56.1                   104                               82                    0.27              6.9

2.20               55.9                   108                               85                    0.26              6.7

2.19               55.6                   112                               88                    0.25              6.4

2.18               55.4                   116                               91                    0.24              6.2

2.17               55.1                   120                               94                    0.23              5.9

2.16               54.9                                                        97                    0.22              5.7

2.15               54.6                                                       100                   0.21              5.4

2.14               54.4                                                       103                   0.20              5.2

2.13               54.1                                                       106                   0.19              4.9

2.12               53.8                                                       109                   0.18              4.7

2.11               53.6                                                       112                   0.17              4.4

2.10               53.3                                                       115                   0.16              4.1

2.09               53.1                                                       118                   0.15              3.9

2.08               52.8                                                       120                   0.14              3.6

307B Link Assembly

Pitch (135.0 mm / 5.31 inch)

307B Link Assembly

Pitch (154.0 mm / 6.01 inch)

311B 312B Link Assembly

Pitch (171.5 mm / 6.75 inch)

312B Link Assembly

Using ?9K? Standard Links

Pitch (171.5 mm / 6.75 inch) 

*    For machines serial number 6SW0457 & Up, and 9NW0210 & Up.

**  For machines serial number 2KW0223 &Up, and 9FS 0682 and Up.