ELBOW 5N3694 - Caterpillar

Gas EngineG3516C (S/N: F6J1-UP)Generator SetG3516C (S/N: GSB1-UP; TJB1-UP; GZC1-UP; TJC1-UP; F6D1-UP; F6E1-UP; F6F1-UP; GZZ1-UP)G3516E (S/N: F6G1-UP; GAS1-UP; SLY1-UP)G3520C (S/N: FZA1-UP; GZA1-UP; FZB1-UP; GZB1-UP; FZC1-UP; FZD1-UP; MAD1-UP; FZE1-UP; FZF1-UP; FZG1-UP; GZK1-UP; GZL1-UP; GZM1-UP; GZN1-UP; B9P1-UP; RLP1-UP; LGS1-UP; HAT1-UP; CWW1-UP; CWY1-UP)G3520E (S/N: GZG1-UP; GZH1-UP)Power ModulePMG3516 (S/N: JKK1-UP)Introduction
This Special Instruction provides clear instructions to a field technician who is servicing the 180 mm Extra High Temperature Throttle with Slow Dynamics.Safety Section
Serious injury can result from failure to use personal protective equipment. Wear the appropriate personal protective equipment that is required for the tasks that are being performed.
General Information
Serviceable Parts
Table 1
Part Number Description Qty
1L-8490 Retaining Ring 1
2N-5749 O-Ring Seal 1
3H-5840 Bolt 3
3J-1907 O-Ring Seal 1
6J-6478 Washer 10
8T-0908 Bolt 3
9S-8004 O-Ring Plug 1
9T-5112 Screw 4
087-4677 Bolt 6
196-0346 Washer 3
288-5476 O-Ring Seal 1
360-0424 Bearing 2
360-0425 Seal 2
346-4897 O-Ring Seal 1
363-4965 Gasket 1
363-4990 Coupling 1
374-4546 Bolt 4
384-0897 Bushing 4
493-1028 Actuator 1 Throttle Inspection and Replacement Requirements
Inspect Unit Serial Number
Illustration 1 g03850745
(1) Serial number plate
Record serial number and submit with order of replacement components.Inspect Unit for Binding
Illustration 2 g03850746
(A) 90 degrees
(2) 360-0423 Plate
Press plate (2) at 90 degrees (A). If unit is stiff, completely binds, or cogs in its travel, the throttle must be repaired.Decouple Actuator from Valve
Illustration 3 g03850747
(3) 8T-0908 Bolt
(4) 363-4990 Coupling
(5) 493-1028 Actuator
Place a solid spacer under actuator (5) to support the weight of the actuator during disassembly.
Loosen the two coupling bolts (3).
Illustration 4 g03850749
(5) 493-1028 Actuator
(6) 363-3152 Housing
(7) 374-4546 Bolt
(8) 384-0897 Bushing
Remove the four bolts (7) and four bushings (8) from actuator (5) and housing (6).
Illustration 5 g03850781
(5) 493-1028 Actuator
(6) 363-3152 Housing
(9) 363-3157 Plate (Manifold)
Lift and slide away actuator (5) from housing (6) and plate (9).Inspect Valve and Actuator
Illustration 6 g03850782
384-0897 Bushing
(B) Mating surface
Illustration 7 g03860183
384-0897 Bushing
(B) Mating surface
Illustration 8 g03860184
374-4546 Bolt
(B) Mating surface
Inspect the mating surfaces (B) for damage on the 374-4546 Bolts and the 384-0897 Bushings.
Illustration 9 g03850783
(A) 90 degrees
(2) 360-0423 Plate
Press plate (2) at 90 degrees (A).If the valve moves freely and there is no evidence of high temperature exposure to the valve or rubbing marks between the plate and bore, measure the gap between the plate and bore (refer to "Verify Plate Clocking Angle", Step 3) and continue with actuator inspection.If the valve binds, proceed to "Valve Teardown and Inspection".
Illustration 10 g03850784
(4) 363-4990 Coupling
(5) 493-1028 Actuator
Illustration 11 g03850786
Rotate coupling (4) on actuator (5) counterclockwise (CCW).The shaft should rotate approximately 70 degrees to 75 degrees.If the actuator binds, order a complete 493-1028 Actuator. Refer to "Actuator Coupling Assembly".Valve Teardown and Inspection
Illustration 12 g03850787
(2) 360-0423 Plate
(10) 3H-5840 Bolt
Loosen the three retaining bolts (10) of plate (2).
Recheck to see if any binding of the throttle is relieved by loosening the bolts.If binding is eliminated and the part post-dates the serial number cutoff (SN: 16161935), follow the reshimming and clocking process. Refer to "Actuator Coupling Assembly".Note: This only applies when there is NO evidence of high temperature exposure. (If there is any question, continue with seal and bearing inspection).If binding persists, continue.
Illustration 13 g03850788
(2)