- Marine Engine:
- 3406E MARINE (S/N: 9WR1-UP)
Introduction
This Special Instruction is intended to provide information on the Engine Overhaul Kit Consist and detailed information on specific parts that should be used based on engine arrangements.
This Engine Overhaul Kit may contain extra parts and extra quantities due to the variety of engine arrangements assigned to a given kit. Refer to the corresponding Parts Manual or Disassembly and Assembly manual in Table 1.
Note: This Kit may contain upgraded parts. These upgraded part numbers may be different than what you have in the parts manual or engine, but these parts have been technically reviewed for compatibility with your application.
Note: This kit contains gasket kits and includes additional parts needed to perform an engine overhaul.
Note: This kit does not contain rod bearings, main bearings, and thrust plates.
Note: For assistance with technical questions, contact your local Cat dealer.
Note: For more information, visit us at catmarinesupport.com.
Note: For access to our website you can scan the QR code below with a QR enabled device.
Illustration 1 | g03319969 |
Reference Material
Engine Model     | Engine Arrangement     | Engine Serial Number Range     | Parts Book Media     | Disassembly and Assembly Media     |
3406E     | 234-9228     | S/N:9WR1-UP     | SEBP2555     | SENR1169     |
255-8712 |
Note: For ordering reference material contact your local Cat dealer.
3406E 435-8503 Major Overhaul Kit Consist
435-8503 Major Overhaul Kit Consist     | ||
Gasket Kits     | ||
Part Number     | Part Name     | Qty     |
349-1530     | Rear Structure Gasket Kit     | 1     |
433-7623     | After Cooler and Lines Gasket Kit     | 1     |
433-9243     | Heat Exchanger Gasket Kit     | 1     |
433-9843     | Fuel System Gasket Kit     | 1     |
434-0857     | Front Structure Gasket Kit     | 1     |
434-1393     | Central and Lower Structure Gasket Kit     | 1     |
433-1394     | Oil Cooler and Lines Gasket Kit     | 1     |
438-8574     | Single Cylinder Head Gasket Kit     | 1     |
Additional Parts Included in This Kit     | ||
Part Number     | Part Name     | Qty     |
1R-0749     | Fuel Filter     | 1     |
1R-1808     | Engine Oil Filter     | 1     |
2N-0931     | Gasket     | 4     |
2N-2766     | Locknut     | 12     |
2N-3350     | O-Ring Seal     | 2     |
3G-2292     | Locking Bolt     | 5     |
3S-9643     | Lip Type Seal     | 2     |
4N-0641     | Gasket     | 1     |
4N-0933     | Gasket     | 2     |
4N-1156     | Regulator Cover Gasket     | 1     |
4N-8150     | Spring     | 2     |
5P-5678     | Seal     | 7M     |
6V-6609     | O-Ring Seal     | 3     |
9X-7378     | O-Ring Seal     | 1     |
061-7540     | O-Ring Seal     | 1     |
100-7399     | Plug     | 2     |
101-8468     | Bushing     | 1     |
106-1792     | Taperlock Stud     | 12     |
109-0076     | O-Ring Seal     | 2     |
124-9052     | Gasket     | 1     |
126-1756     | Locking Bolt     | 4     |
126-1757     | Washer     | 9     |
130-4698     | Bushing     | 1     |
131-7123     | Bushing     | 1     |
155-9524     | Integral Seal     | 1     |
214-7566     | O-Ring Seal     | 1     |
214-7568     | O-Ring Seal     | 5     |
228-7093     | O-Ring Seal     | 2     |
238-5080     | O-Ring Seal     | 5     |
238-5081     | O-Ring Seal     | 2     |
238-5084     | O-Ring Seal     | 1     |
248-5513     | Temperature Regulator     | 2     |
268-5589     | Seal     | 1     |
392-9208     | Valve Plunger     | 2     |
Note: For assistance or technical questions contact your local Cat dealer.
Note: Refer to Illustration 2 for location of gasket kits.
3406E Engine Gasket Kit Locations
Illustration 2 | g03402964 |
(1) Rear Structure ( 349-1530 Gasket Kit ) (2) Single Cylinder Head ( 438-8574 Gasket Kit ) (3) Aftercooler and Lines ( 433-7623 Gasket Kit ) (4) Fuel System ( 433-9843 Gasket Kit ) (5) Heat Exchanger ( 433-9243 Gasket Kit ) (6) Front Structure ( 434-0857 Gasket Kit ) (7) Central and Lower ( 434-1393 Gasket Kit ) (8) Oil Cooler and Lines ( 433-1394 Gasket Kit ) |
Gasket Kit Consists
Rear Structure (349-1530 Gasket Kit)
349-1530 Gasket Kit (Rear Structure)     | ||
Part Number     | Part Name     | Qty     |
2A-1162     | Gasket     | 3     |
4H-7869     | Gasket     | 1     |
5H-0244     | Gasket     | 1     |
9Y-6089     | Gasket     | 1     |
142-5868     | Crankshaft Seal     | 1     |
155-5619     | Gasket     | 1     |
234-8937     | Integral Seal     | 1     |
250-0466     | O-Ring Seal     | 1     |
Refer to Illustration 2.
Aftercooler and Lines (433-7623 Gasket Kit)
433-7623 Gasket Kit (Aftercooler and Lines)     | ||
Part Number     | Part Name     | Qty     |
2M-9780     | O-Ring Seal     | 2     |
3P-0654     | O-Ring Seal     | 2     |
5M-3038     | O-Ring Seal     | 2     |
6L-1650     | O-Ring Seal     | 3     |
6V-3917     | O-Ring Seal     | 2     |
6V-4365     | O-Ring Seal     | 5     |
6V-5048     | O-Ring Seal     | 2     |
7D-7111     | O-Ring Seal     | 1     |
8L-2786     | O-Ring Seal     | 1     |
123-5205     | Gasket     | 2     |
130-5694     | O-Ring Seal     | 2     |
150-4104     | Gasket     | 1     |
214-7568     | O-Ring Seal     | 1     |
237-7623     | O-Ring Seal     | 2     |
Refer to Illustration 2.
Heat Exchanger (433-9243 Gasket Kit)
433-9243 Gasket Kit (Heat Exchanger)     | ||
Part Number     | Part Name     | Qty     |
2N-0931     | Gasket     | 1     |
6L-1650     | O-Ring Seal     | 1     |
6V-5656     | O-Ring Seal     | 2     |
9X-7378     | O-Ring Seal     | 3     |
110-7753     | O-Ring Seal     | 2     |
136-9486     | Liner     | 4     |
Refer to Illustration 2.
Fuel System (433-9843 Gasket Kit)
433-9843 Gasket Kit (Fuel System)     | ||
Part Number     | Part Name     | Qty     |
1P-0436     | Gasket     | 3     |
6V-5048     | O-Ring Seal     | 5     |
6V-6923     | Backup Ring     | 1     |
8L-2786     | O-Ring Seal     | 1     |
033-6033     | O-Ring Seal     | 1     |
107-5769     | O-Ring Seal     | 2     |
214-7568     | O-Ring Seal     | 10     |
238-5081     | O-Ring Seal     | 1     |
Refer to Illustration 2.
Front Structure (434-0857 Gasket Kit)
434-0857 Gasket Kit (Front Structure)     | ||
Part Number     | Part Name     | Qty     |
3K-0360     | O-Ring Seal     | 2     |
5E-8771     | O-Ring Seal     | 1     |
6V-1197     | O-Ring Seal     | 1     |
7X-4805     | O-Ring Seal     | 2     |
8L-2786     | O-Ring Seal     | 2     |
8T-9527     | O-Ring Seal     | 1     |
9M-3786     | O-Ring Seal     | 1     |
061-9455     | O-Ring Seal     | 3     |
103-6045     | Seal     | 1     |
107-5769     | O-Ring Seal     | 2     |
109-0077     | O-Ring Seal     | 1     |
117-8801     | O-Ring Seal     | 1     |
122-3772     | O-Ring Seal     | 1     |
142-5867     | Crankshaft Seal     | 1     |
144-6142     | Integral Seal     | 1     |
155-3629     | Gasket     | 1     |
166-9144     | Gasket     | 1     |
214-7568     | O-Ring Seal     | 1     |
250-0466     | O-Ring Seal     | 1     |
Refer to Illustration 2.
Central and Lower (434-1393 Gasket Kit)
434-1393 Gasket Kit (Central and Lower Structure)     | ||
Part Number     | Part Name     | Qty     |
2P-3760     | Gasket     | 2     |
2P-4305     | Gasket     | 4     |
3J-1907     | O-Ring Seal     | 1     |
3J-7354     | O-Ring Seal     | 2     |
4N-0699     | Gasket     | 3     |
4N-0933     | Gasket     | 1     |
4N-1151     | Gasket     | 1     |
5K-9090     | O-Ring Seal     | 4     |
5P-5846     | O-Ring Seal     | 2     |
5P-8068     | O-Ring Seal     | 3     |
5P-8210     | O-Ring Seal     | 2     |
6V-3683     | O-Ring Seal     | 1     |
6V-5048     | O-Ring Seal     | 3     |
7M-8485     | O-Ring Seal     | 2     |
8C-0624     | O-Ring Seal     | 1     |
8C-3445     | Dust Cap     | 2     |
8J-4351     | O-Ring Seal     | 2     |
9X-7378     | O-Ring Seal     | 1     |
109-0072     | O-Ring Seal     | 1     |
109-0073     | O-Ring Seal     | 2     |
109-0077     | O-Ring Seal     | 1     |
109-0078     | O-Ring Seal     | 1     |
109-7425     | Cover Seal     | 1     |
114-4427     | O-Ring Seal     | 1     |
118-5068     | O-Ring Seal     | 2     |
126-4935     | Integral Seal     | 1     |
214-7566     | O-Ring Seal     | 2     |
214-7568     | O-Ring Seal     | 2     |
Refer to Illustration 2.
Oil Cooler and Lines (434-1394 Gasket Kit)
434-1394 Gasket Kit (Oil Cooler and Lines)     | ||
Part Name     | Part Number     | Qty     |
1J-9671     | O-Ring Seal     | 2     |
1W-2636     | Gasket     | 1     |
2N-3350     | O-Ring Seal     | 4     |
2P-3760     | Gasket     | 2     |
4L-1267     | Gasket     | 1     |
4N-0641     | Gasket     | 1     |
4N-0933     | Gasket     | 1     |
109-0073     | O-Ring Seal     | 2     |
109-0076     | O-Ring Seal     | 4     |
109-0077     | O-Ring Seal     | 3     |
109-0078     | O-Ring Seal     | 3     |
214-7567     | O-Ring Seal     | 2     |
Refer to Illustration 2.
Single Cylinder Head (438-8574 Gasket Kit)
438-8574 Gasket Kit (Single Cylinder Head)     | ||
Part Number     | Part Name     | Qty     |
1W-2636     | Gasket     | 1     |
2M-9780     | O-Ring Seal     | 1     |
2N-2766     | Locknut     | 4     |
3E-6772     | Seal     | 24     |
3K-0360     | O-Ring Seal     | 1     |
3S-9643     | Lip Type Seal     | 1     |
4N-0641     | Gasket     | 1     |
4N-1156     | Regulator Cover Gasket     | 1     |
5P-0840     | O-Ring Seal     | 2     |
5P-7530     | O-Ring Seal     | 1     |
6I-2517     | Gasket     | 1     |
6J-2245     | O-Ring Seal     | 1     |
6L-1650     | O-Ring Seal     | 1     |
6L-8562     | Taperlock Stud     | 4     |
6V-0128     | O-Ring Seal     | 1     |
6V-1197     | O-Ring Seal     | 1     |
6V-4365     | O-Ring Seal     | 5     |
6V-4367     | O-Ring Seal     | 1     |
6V-5050     | O-Ring Seal     | 1     |
7D-7111     | O-Ring Seal     | 1     |
7M-7273     | Gasket     | 1     |
8L-2777     | O-Ring Seal     | 12     |
8L-2786     | O-Ring Seal     | 3     |
9X-7430     | O-Ring Seal     | 6     |
061-8639     | O-Ring Seal     | 6     |
109-0072     | O-Ring Seal     | 2     |
109-0073     | O-Ring Seal     | 1     |
109-0077     | O-Ring Seal     | 1     |
114-2687     | O-Ring Seal     | 1     |
114-4427     | O-Ring Seal     | 1     |
117-8801     | O-Ring Seal     | 1     |
124-9052     | Gasket     | 1     |
129-9452     | Exhaust Manifold Gasket     | 6     |
142-2329     | Seal     | 1     |
166-2904     | O-Ring Seal     | 12     |
214-7568     | O-Ring Seal     | 4     |
227-1204     | Gasket     | 1     |
242-9537     | Valve Cover Seal     | 3     |
243-1159     | Fastener     | 12     |
272-0390     | Seal     | 1     |
272-2583     | O-Ring Seal     | 1     |
359-0908     | Cylinder Head Gasket     | 1     |
Refer to Illustration 2.