1S8687 Spacer Fits Caterpillar Models

One New Aftermarket Replacement Spacer for Caterpillar (Cat) Equipment

This steel spacer (Caterpillar part 1S-8687) is used in belt tightener assemblies to adjust and maintain belt tension across a wide range of Cat (Caterpillar) construction, mining, and earthmoving equipment. Manufactured from carbon steel and alloy zinc, this precision-dimensioned spacer ensures proper belt alignment and prevents slippage in demanding heavy equipment applications.

Specifications

• Inside Diameter: 25.5 mm
• Outside Diameter: 33.4 mm
• Overall Length (Thickness): 31.75 mm
• Material: Carbon Steel / Alloy Zinc

Compatible Models

Caterpillar Excavators: 245, 245B, 245D, 375, 375-A, 375-A L, 5080, 5110B

Caterpillar Wheel Tractor-Scrapers: 621, 621B, 621E, 621F, 621G, 623B, 623E, 623F, 623G, 627B, 627E, 627F, 627G, 631C, 631D, 631E, 631G, 633C, 633D, 633E II, 637, 637D, 637E, 637G, 639D, 641, 651, 651B, 651E, 657, 657B, 657E

Caterpillar Pipelayers: 578, 583R, 587R, 594, 594H

Caterpillar Track-Type Tractors: D8, D8 GC, D8GC, D8L, D8N, D8R, D8R II, D9G, D9H, D9L, D9R, D10N, D10R

Caterpillar Motor Graders: 16G, 24H

Caterpillar Off-Highway Trucks: 773, 775

Caterpillar Load Haul Dump: R2900, R2900G, R3000H

Caterpillar Underground Articulated Trucks: AD40, AD45, AD55, AE40, AE40 II

Caterpillar Winches: 57H, 58L, 59, 59L, 59N

Caterpillar Front Shovel: 5080

Caterpillar Wheel Tractors: 666

Replaces Part Number(s):

1S8687, 1S-8687

New aftermarket replacement part - not remanufactured, not used.