A New Alternator Belt Guard Is Used on Certain 3500 Machine Engines {7150, 7174}
- Engine:
- 3516B (S/N: TRE1-UP)
- Excavator:
- 5130 (S/N: 7TJ1-UP; 5ZL1-UP)
- Off-Highway Truck:
- 777D (S/N: DCB1-UP; AGC1-UP; FKR1-UP; 3PR1-UP; AGY1-UP)
- Track-Type Tractor:
- D11N (S/N: 4HK1-UP; 74Z1-UP)
- Wheel Loader:
- 994F (S/N: 4421-UP)
- 5130B (S/N: 4CS1-UP)
- 5230 (S/N: 7LL1-UP)
- 5230B (S/N: 4HZ1-UP)
- 785 (S/N: 8GB1-UP)
- 785B (S/N: 6HK1-UP)
- 785C (S/N: 1HW1-UP; APX1-UP; 5AZ1-UP)
- 785D (S/N: MSY1-UP)
- 789 (S/N: 9ZC1-UP)
- 789B (S/N: 7EK1-UP)
- 789C (S/N: 2BW1-UP)
- 789D (S/N: SPD1-UP; SHH1-UP)
- 793 (S/N: 3SJ1-UP)
- 793B (S/N: 1HL1-UP)
- 793C (S/N: 4AR1-UP; ATY1-UP; 4GZ1-UP)
- 793D (S/N: FDB1-UP)
- D7R (S/N: 2WY1-UP)
- 994H (S/N: DWC1-UP)
Description of Change: The new belt guard has the following characteristics:
- Improved geometry for stress relief and for avoiding interference
- A broader top and bottom mounting tabs
Adaptable To: The new guard is adaptable to the engines in the machines that are listed above back to first production.
The new parts and the previously used parts are listed in Table 1.
The effective serial numbers are listed in Table 2.
Show/hide table
Qty     | New Part     | Previous Part     |
1     | 390-1272 Belt Guard     | 209-5284 Guard     |
1     | 0S-1591 Bolt     | 0S-0509 Bolt     |
1     | 101-3120 Spacer     | 9L-9132 Washer     |
Show/hide table
Effective Serial Numbers     | |
Sales Model     | Serial Number     |
5130     | S/N:5ZL00125     |
S/N:7TJ00002 | |
5130B     | S/N:4CS00219     |
5230     | (S/N: 7LL00106)     |
5230B     | S/N:4HZ00237     |
777D     | S/N:3PR78005     |
S/N:6XZ00107 | |
S/N:AGC77013 | |
S/N:DCB32224 | |
S/N:FKR01613 | |
777D HA     | S/N:2YW00106     |
S/N:AGY00081 | |
785     | S/N:8GB78009     |
785B     | S/N:6HK99382     |
785C     | S/N:1HW00135     |
S/N:APX75002 | |
785C HA     | S/N:5AZ00428     |
785D     | S/N:MSY00486     |
789     | S/N:9ZC78003     |
789B     | S/N:7EK75006     |
789C     | S/N:2BW83002     |
789D     | S/N:SHH00307     |
S/N:SPD00272 | |
793     | S/N:3SJ75002     |
793B     | S/N:1HL78008     |
793C     | S/N:4AR77003     |
S/N:4GZ75003 | |
S/N:ATY01125 | |
793D     | S/N:FDB-1658     |
994F     | S/N:44200341     |
994H     | S/N:DWC00336     |
D11N     | S/N:4HK78002     |
S/N:74Z77002 | |
3516B     | S/N:TRE00107     |
Rework Procedure
- Remove existing upper and lower belt guards. Retain all hardware for reuse except the following:
Show/hide table
Illustration 1 | g03087017 |
Guards removed |
- Install new guard (1). Attach the top tab using nut (2) and the original washer (5). Attach the bottom tab using bolt (3) and spacer (4) .
Show/hide table
Illustration 2 | g03087060 |
(1) 390-1272 Belt Guard (2) 3K-2889 Locknut (3) 0S-1591 Bolt (4) 101-3120 Spacer (5) Washer |
- Tighten nut (2) to standard torque. Visually confirm clearance between guard (1) and the belt/pulley. Tighten bolt (3) to standard torque.
- Reinstall upper guard using existing hardware and tighten to standard torque.
Show/hide table
Illustration 3 | g03087082 |
288-6174 Alternator Guard As installed |
Caterpillar Information System:
C175-16 Locomotive Engine Fuel Lines - High Pressure Common Rails
C280-12 and C280–16 Marine Engines Fuel Filter Housings - Remove
C7.1 Industrial Engine Coolant Sample (Level 2) - Obtain
C7.1 Industrial Engine Coolant Sample (Level 1) - Obtain
C7.1 Industrial Engine Coolant Level - Check
C4.4 Industrial Engine Coolant Extender (ELC) - Add
3500 Engines Fuel Injector Mechanism
C7.1 Industrial Engine Coolant (ELC) - Change
3500B and 3500C Marine Engines Fuel Injector Mechanism
C280-12 and C280–16 Marine Engines Auxiliary Water Pump - Install
2012/06/15 New O-Ring Seals Are Used for the Tube in Certain C175-16 Engine Oil Pressure Regulators {1304}
2012/06/08 A New Valve Cover Is Used on Certain C175 Engines {1107}
3500C Marine Engines Fuel Injector
3500 Engines Camshaft
C7.1 Industrial Engine Fuel Filter Base - Primary Fuel Filter Base
3500 Engines Camshaft
3500 Engines Camshaft
Procedure for Installing the 373-8980 Console Harness As on Certain Excavators{1408, 5258} Procedure for Installing the 373-8980 Console Harness As on Certain Excavators{1408, 5258}
2012/07/06 Improved Engine Oil Pump Lines Are Now Used on Certain C9 Engines {1304, 1307}
UPS 120, UPS 150, UPS 250 and UPS 300 Uninterruptible Power Supplies Bearing (Earlier) - Replace
UPS 120, UPS 150, UPS 250 and UPS 300 Uninterruptible Power Supplies Bearing (3.5 EVD or Greater) - Replace
C280-12 and C280–16 Marine Engines Fuel Filter Housings - Install
2012/06/15 New Clamping Method for Oil Cooler Supply Tubes for Certain 3512C and 3516C Engines {1307, 1308}
C280-12 and C280–16 Marine Engines Engine Oil Filter Housings - Remove