We can supply CAT spare parts as following:
2W-1709 2W1709 RING
8N-3102 8N3102 PISTON
6N-9915 6N9915 VALVE
6N-9916 6N9916 VALVE
2P-1262 2P1262 GUIDE
6V-2525 6V2525 KIT VG
6V-1549 6V1549 KIT C+L
8T-2466 8T2466 KIT FRONT
190-0643 1900643 Tensioner
161-4113/0R-9449 1614113/0R9449 Oil Pump
137-5541 1375541 Priming Pump
1P-0436 1P0436 Gasket
281-2725 2812725 Non Return Valve
384-8612/20R-1525 3848612/20R1525 Lift Pump
272-0389 2720389 Seal - Rocker Box
229-5711 2295711 Seal - Cyl Head Cover
223-7852 2237852 Seal - Timing Case Cover
117-8801 1178801 Seal - O Ring
6V-3834 6V3834 Oil Pump Seal O Ring         
6D-7146 6D7146 O Ring         
6V-5134 6V5134 O Ring         
5P-8068 5P8068 Sealing Ring   
8J-4351 8J4351 O Ring         
3E-6788 3E6788 O Ring         
346-4897 3464897 O Ring         
061-9455 0619455 Seal           
217-3673 2173673 Sump Gasket    
5P-8211 5P8211 O Ring         
113-5304 1135304 O Ring         
224-6361 2246361 Seal - Thermostat Housing
227-5075 2275075 Seal - Thermostat Housing
3S-9643 3S9643 Seal - Thermostat Housing
7L-6580 7L6580 O Ring         
341-1429 3411429 Oil Cooler O Ring         
2N-5243 2N5243 O Ring         
224-2675 2242675 Seal           
6V-7350 6V7350 Water Pump O Ring         
229-8810 2298810 O Ring         
349-2654 3492654 Seal           
225-7003 2257003 O Ring         
274-6851 2746851 Gasket-Turbocharger
197-8418 1978418 Gasket         
197-8419 1978419 Gasket         
225-6948 2256948 O Ring         
228-7090 2287090 Seal - O Ring
214-7568 2147568 O Ring         
230-3518 2303518 Gasket - Ind Manifold
6V-6353 6V6353 Seal - O Ring
283-2238 2832238 Gasket
1P-0436  1P0436 Gasket-Priming Pump
117-8801 1178801 Seal - O Ring
233-5220 2335220 OIL PUMP
322-3155 3223155 Oil Filter
360-8958 3608958 Fuel Filter Assembly
360-8960 3608960 Fuel Filter
438-5386 4385386 Pre-Fuel Filter
131-8822 1318822 Air Filter-Primary
131-8821 1318821 Air Filter-Secondary
350-8747 3508747 Belt
436-7781 4367781 Big End Bearing Kit
480-4491 4804491 Big End Brg Kit - U/S
480-4490 4804490 Big End Brg Kit - U/S
480-4489 4804489 Big End Brg Kit - U/S
276-7478 2767478 Small End Bush
448-4217 4484217 Main Bearing Kit
448-4218 4484218 Main Bearing Kit - U/S
448-4220 4484220 Main Bearing Kit - U/S
448-4222 4484222 Main Bearing Kit - U/S
376-4074 3764074 Crankshaft
363-0559/364-5145 3645145(3630559) Thrust Washer
448-4227 4484227 Thrust Washer Kit - O/S
277-3013 2773013 Seal - Front End Oil
232-7449 2327449 Seal - Reos Housing
370-6545 3706545 Camshaft Bush
450-5996/444-2190 4442190 Piston And Ring Kit
391-3732 3913732 Piston And Ring Kit - O/S
391-3735 3913735 Piston And Ring Kit - O/S
276-7476 2767476 Piston Ring Kit
380-2065 3802065 Piston Ring Kit - Oversize
466-4849 4664849 Piston Ring Kit - Oversize
309-6678 3096678 Intake Valve
339-9637 3399637 Exhaust Valve
377-0399 3770399 Valve Seat Insert
377-0400 3770400 Valve Seat Insert
299-5511 2995511 Seal - Valve Stem
276-8123 2768123 Valve Collet
436-0521 4360521 Valve Spring
276-8133 2768133 Cap
278-5125 2785125 Tappet
319-8426/2785126 2785126(3198426) Pushrod
278-5111 2785111 Rocker Arm Assembly
278-5112 2785112 Rocker Arm Assembly
371-3974/20R-4560 3713974 Injector
375-2647/20R-4562 3752647 High Pressure Fuel Pump
485-4895 4854895 Water Pump Kit
277-2925 2772925 Connection
420-0454 4200454 Oil Pump
462-2235 4622235 Glowplug
344-1722 3441722 Tensioner
329-5254 3295254 Pulley
315-9810/10R-9580/458-8357 3159810 Turbocharger
 4588357 Turbocharger
354-5671/20R-4877 3545671 Starter Motor
344-5081/20R-0958 3445081 Alternator
329-3796 3293796 Piston Cooling Jet
375-2013 3752013 Camshaft
344-7390  3447390 Hp Pump Speed Sensor
256-6454 2566454 Temperature Sensor
320-3062 3203062 Air Pressure Sensor Kit
238-0120/384-3888 2380120 Crankshaft Speed Sensor
 3843888 Crankshaft Speed Sensor
320-3060 3203060 Oil Pressure Sensor Kit   
We supply original parts for Caterpillar main models, as follows:
Caterpillar Excavator:LCR,322,322B,322BL,322C,322C FM,322CL,322D,322L,322N,323D LN,323D S,323DL,324D,324D FM,324D LN,324DL,324E,324E LN,324EL,325,325B,325B LN,325BL,325C,325C FM,325CL,325D,325D FM,325DL,325L,326D2,326D2L,326DL,326F,326F LN,326FL,328D LCR,329D,329D LN,329D2,329D2L,329DL,329E,329E LN,329EL,330,330B,330B LN,330BL,330C,330CL,330D,330DL,330F,330L,336D,336DL,336E,336EL,345,345B,345BL,345C,345CL,345D,345DL,349D,349EL,350L,365BL,365CL,375,375L,385CL,390D,390FL,5080,5130,5130B,5230,992G,994,994D,E110,E110B,E120,E120B,E200B,E240,E240B,E240C,E300,E300B LC,E70,E70B,EL180,EL200B,EL240,EL240B,EL240C,EL240C LC,EL300B,M325B etc.
Caterpillar backhoe:414E,416,416B,416C,416D,416E,420,420B,420C,420D,420DIT,420E,420F,422E,424D,426,426B,426C,426D,428,428B,428C,428D,428E,430D,430E,432D,432E,434E,436II,436B,436C,438,438C,438D,442,442D,442E,446B,446D,450E,4P,517,54H,924G,924GZ,924HZ,928H,928HZ,930H,D4HTSKII,D4HTSKIII.
Caterpillar wheel loader:902,904B,908C,908H,910,910E,914G,914K,916,920,922B,924F,924G,924H,926,926A,926E,928F,928G,930,930G,930H,930R,930T,936,936E,936F,938F,938G,938H,944,950,950B,950E,950F,950G,950H,962G,962H,962M,966C,966D,966E,966F,966G,966H,966K,966R,970F,972G,972H,980B,980C,980F,980G,980H,988,988B,988C,988F,988G,988H,990,990H,992,992B,992C,992D,992G,992K,993K,994,994D,994F,G910,IT14G,IT18B,IT28B,IT28F,IT28G,IT28H,IT38,IT38F,IT38G,IT38H etc.
Caterpillar skid steer:216,226B Series 3,232B,236,236B,242B,242B Series 3,246,247B,247B II,252B,256C,257B,257D,259B3,262B,262C,267B,272C,277B,277C,279C,287B,287D,289C,289D,299C,299D,515,518,518C,525,525B,528,528B,530B,535C,545,545C,773B,773D,773E,773F,775B,775D,775E,775F,950E,FB518 etc.
Caterpillar heavy duty truck:769 770 772 773 775 777 785 789 793 797 etc.
Caterpillar generator sets:3066,3114,3116,S6K,3126,3126B,3126E,3145,3150,3160,3176,3176B,3176C,3196,3204,3208,3304,3304B,G3304,3306,3306B,3306C,G3306,3406,3406B,3406C,3406E,3408,3408B,3408C,3408E,G3408,3412,3412C,3412E,G3412,3456,3504,3504B,C32,C32B,GC32,3512,3512B,G3512,PM3512,3516,3516B,G3516,PM3516,C9,C10,C12,C15,C16,D13000,D311,D315,D318,D320,D326,D330,D333,D333C,G333,D334,D336,D337,D342,G342,D343,G343,D346,D348,G348,D349,D353,D364,D375,D379, D379B,G379,D386,D397, D398,D398B,G398
Caterpillar Engine:3066,3116,3126,3306,3406,3408,3412,C32,3512,3516,3606,3608,3612,C4.4,C6.4,C6.6,C7,C9,C10,C11,C12,C13,C15,C18,C27,C32,C175,C280
Caterpillar Gas engine:G3304,G3612,G3408C,G3606,G399,G3616,G3608,G3606B,G353D,G333C,G3408,G3408B,G342C,G379,G379A,G398,G343,G3304B,G3512B,G3306B