BELT-SERPENTINE 2941781 - Caterpillar

Engine3508 (S/N: CNF1-UP; CTF1-UP; PTK1-UP; 5XM1-UP; 3LS1-UP; CAW1-UP; 5PW1-UP; 95Y1-UP; 1JZ1-UP; 23Z1-UP; 68Z1-UP; 70Z1-UP)3508B (S/N: S2A1-UP; CNB1-UP; S2B1-UP; CTC1-UP; PTJ1-UP; 2BM1-UP; 3DM1-UP; 4GM1-UP; 7SM1-UP; PTN1-UP; 6PN1-UP; 1TW1-UP; 2HW1-UP; 3DW1-UP; 5KW1-UP; BGX1-UP; 1FZ1-UP)3512 (S/N: CTE1-UP; PTG1-UP; CMJ1-UP; FDR1-UP; 3MS1-UP; 6WW1-UP; 49Y1-UP; 50Y1-UP; 1KZ1-UP; 24Z1-UP; 65Z1-UP; 67Z1-UP)3512B (S/N: CTB1-UP; CMC1-UP; FDE1-UP; BLF1-UP; PTF1-UP; S2G1-UP; CTH1-UP; S2H1-UP; BRK1-UP; PTM1-UP; 7HM1-UP; 8EM1-UP; 8RM1-UP; 4TN1-UP; 6WN1-UP; 1PW1-UP; 2GW1-UP; 4AW1-UP; 5AW1-UP; 1GZ1-UP; 2EZ1-UP)3512C (S/N: LLA1-UP; LLD1-UP; RMS1-UP)3516 (S/N: CMD1-UP; CTD1-UP; PTD1-UP; 4XF1-UP; 5SJ1-UP; CAL1-UP; 7KM1-UP; GZR1-UP; 3NS1-UP; RKT1-UP; 8TW1-UP; GZX1-UP; 1LZ1-UP; 25Z1-UP; 27Z1-UP; 71Z1-UP; 73Z1-UP)3516B (S/N: CPA1-UP; CTA1-UP; PTA1-UP; BMB1-UP; PTC1-UP; CDE1-UP; CTG1-UP; BPJ1-UP; CTJ1-UP; LEK1-UP; CBN1-UP; FDN1-UP; 6HN1-UP; 7RN1-UP; 8CN1-UP; 8KN1-UP; 9AN1-UP; S2P1-UP; GAR1-UP; PBR1-UP; S2R1-UP; GZS1-UP; GZT1-UP; 1NW1-UP; 2FW1-UP; 2JW1-UP; 3CW1-UP; 4BW1-UP; 8NW1-UP; FDX1-UP; GZY1-UP; S2Z1-UP; 1HZ1-UP)G3508 (S/N: 4WD1-UP; 2JF1-UP; 9TG1-UP; CPJ1-UP; CTN1-UP; CPY1-UP)G3512 (S/N: 5JD1-UP; 7NJ1-UP; CTM1-UP; CRN1-UP; CSP1-UP; 5ZZ1-UP)G3512E (S/N: GHD1-UP; GHF1-UP; SSR1-UP; SST1-UP)G3516 (S/N: ZBA1-UP; 8LD1-UP; CPG1-UP; 4EK1-UP; CTL1-UP; CSZ1-UP; ZAZ1-UP)G3516B (S/N: ZBB1-UP; ZBC1-UP; CME1-UP; CTW1-UP; 7EZ1-UP)G3516C (S/N: RWA1-UP; GSB1-UP; TJB1-UP; TJC1-UP; DKR1-UP; GZZ1-UP)G3516E (S/N: GHP1-UP; GAS1-UP; SLY1-UP)G3516H (S/N: NWJ1-UP; GLN1-UP)G3520B (S/N: CWD1-UP; CTK1-UP; GZP1-UP)G3520C (S/N: GDB1-UP; GHC1-UP; MAD1-UP; GHE1-UP; GZJ1-UP; GZK1-UP; GZL1-UP; GZM1-UP; GZN1-UP; B9P1-UP; LGS1-UP; HAT1-UP; CWW1-UP; JBX1-UP; CWY1-UP; JBZ1-UP)G3520E (S/N: GZG1-UP; GZH1-UP; HAL1-UP; GHM1-UP; GHR1-UP; SXY1-UP)G3520H (S/N: GFP1-UP; GFR1-UP)G3524 (S/N: CRC1-UP)G3532 (S/N: CPF1-UP; 8BZ1-UP)Petroleum Engine3508C PETROLEUM (S/N: LLC1-UP)3512C PETROLEUM (S/N: LLB1-UP)3516C PETROLEUM (S/N: PES1-UP)Power ModulePM3508 (S/N: BLM1-UP; BPY1-UP)PM3516 (S/N: BPD1-UP)Introduction
Do not perform any procedure in this Special Instruction until you read this information and you understand this information.This Special Instruction is to provide information about the maintenance and the inspection of the rubber element for the 243-1520 Flexible Coupling Gp, the 247-0308 Flexible Coupling Gp, the 296-8050 Flexible Coupling Gp, the 309-1565 Flexible Coupling Gp, the 370-3967 Flexible Coupling Gp, and the 370-3968 Flexible Coupling Gp.Most torsional couplings use one or more torsional elements that are formed from rubber or from other polymers with similar physical characteristics. The torsional couplings are placed in series to achieve exact stiffness for reducing torsional vibration. The torsional couplings are also used for adding tolerance to parallel offset. These types of rubber couplings are used in generator sets.Required Tools
Table 1
QTY Part Number Description
1 448-0722 Probe
1 448-0723 Probe
1 448-0724 Tool Gp
1 448-0725 Tool Gp General Care
The following factors will accelerate deterioration of rubber:
Age
Repetitive Starting and Stopping of Generator Set
Harsh Electrical Events (such as loss of synchronism) when paralleled with utility
Heat
Ultraviolet light (UV light)
Petroleum products
Solvents
Anaerobic adhesives (thread lock compound)
OzoneAnaerobic adhesives can also deteriorate the bond between rubber elements and the steel flange or the hub.In an environment that is free of an aggressive chemical and light related agents, the main cause of an accelerated deterioration of the rubber is heat.There are five causes of heat buildup in rubber coupling elements:
High ambient temperature
Damping of torsional vibrations
Compensation for angular misalignment
Compensation for radial misalignment or for offset
Compensation for axial misalignment or for movementIn a controlled environment, the destructive conditions can be minimized. The rubber couplings can have a long useful life.
Illustration 1 g01322929
Flexible coupling
(1) Hardness stamp
(2) Outer coupling
(3) Rubber elementPreventive Maintenance Schedule
Maintenance