Caterpillar CX35-P800
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar CX35-P800 is a specialized well service transmission engineered for the oil and gas industry. Designed for high-demand applications including workover rigs, hydraulic fracturing, kill mud pumps, nitrogen units, acidizing units, and cementing units, this unit provides 800 BHP (597 bkW) of gross input power. The transmission is optimized to integrate with C15 ACERT, C18 ACERT, and C27 ACERT engines (A ratings). Available configurations include basic setups and those featuring integral pump drives.
Across its production, the CX35-P800 has maintained a reputation for durability and ease of operation through advanced features like Cat Electronic Clutch Pressure Control (ECPC) and electro-hydraulic fully modulated, oil-cooled multidisc clutches. In today's used parts and secondary market, this unit remains critical due to its proven ability to handle high peak torque of 2700 ft-lb (2700 N·m). Its compatibility with established ACERT engine series makes it a vital component for maintaining existing oilfield power solutions.
Below: full specifications, fluids & capacities, the factory service schedule, common service parts, verified fault codes, what owners discuss, attachment guidance, the complete assembly directory, and a serial-number reference. Complete parts lists with full OEM part numbers, exploded diagrams, quantities, and fitment data are available free in Heavy Parts AI.
Caterpillar CX35-P800 specifications
Engine
| Compatible Engine Models | C15 ACERT, C18 ACERT, and C27 ACERT (A ratings) |
Dimensions
| Input Mounting | SAE #1 dry flywheel housing |
| Side Supports | Two SAE #2 pads |
| Output Connections | 1810 yoke, 1810 companion flange, SPL 250 yoke, ISO 8667-T180 flange |
Performance
| Gross Input Power | 800 BHP (597 bkW) |
| Gross Peak Input Torque | 2700 ft-lb (2700 N·m) |
| Maximum Turbine Torque | 2700 ft-lb (2700 N·m) |
| Rated Input Speed | 2100 r/min |
| Minimum Input Speed | 600 r/min |
| Stall Torque Ratio | 1.962 |
| Gear Configuration | 8 Forward / 1 Reverse |
| Overall Gear Ratio | 9.10 |
| Forward Gear Ratios | 1F: 5.73, 2F: 3.57, 3F: 2.72, 4F: 1.95, 5F: 1.43, 6F: 1.00, 7F: 0.74, 8F: 0.63 |
| Reverse Gear Ratio | -4.46 |
Service capacities (summary)
| Hydraulic Fill Capacity | 34 L (9 gal) fill; 61 L (16 gal) initial fill |
| Maximum Converter Outlet Oil Temperature | 250°F (121°C) |
| Fluid Specification | Cat Transmission/Drive Train Oil-4 (TDTO) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
CX35-P800 fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| transmission/powertrain compartments | 34 L (9 gal) hydraulic fill capacity; 61 L (16 gal) initial fill | Cat Transmission/Drive Train Oil-4 (TDTO) |
| transmission oil system | Cat Transmission/Drive Train Oil-4 (TDTO); maximum converter outlet temperature 121°C (250°F) |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar CX35-P800 maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the CX35-P800 beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize Cat S.O.S fluid analysis to monitor the health of the transmission and engine. Regularly sample hydraulic oil to detect particle counts and oxidation levels, and analyze transmission/drive train oil (TDTO) for wear metals like iron or copper. Monitoring converter outlet temperatures—ensuring they do not exceed 121°C (250°F)—is essential to prevent premature degradation of the torque converter and clutch packs.
Corrective & Common Repairs
Address leaks in the two primary oil cooler lines or electrical connector immediately to prevent system failure. When servicing the 8F/1R gear type, inspect planetary spur gears for wear. If using a rear power take-off (PTO) with an 8 bolt mounting, verify torque on all fasteners. For units with remote mount filters or ECUs, ensure all connections remain secure and free from vibration-induced loosening.
Overhaul & Rebuild Points
Major component evaluation should occur during PM4 intervals. Focus on the lock-up clutch and multi-disc clutches for signs of wear or modulation issues. Inspect the torque converter drive integrity across all gears. During a rebuild, evaluate the condition of the SAE #1 dry flywheel housing and side supports (two SAE #2 pads) to ensure structural mounting stability remains within factory specifications.
Seasonal & Environment Servicing
In high-dust or sandy quarry environments, increase air filter inspections to a daily frequency and clean radiators more often. For units operating in extreme temperatures, monitor the hydraulic fill capacity—ranging from 34 L (9 gal) to 61 L (16 gal) for initial fills—to manage thermal expansion. Ensure all external pump drives and PTO connections are protected from debris buildup that could impede cooling efficiency.
CX35-P800 common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 328-3655 | Filter Element As-Oil | Hydraulic service | Check fitment → |
| 317-9812 | Valve-Relief | Lubrication service | Check fitment → |
| 8S-9129 | Filter-Magnetic | Scheduled service item | Check fitment → |
| 9S-8752 | Nut-Full | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
CX35-P800 fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| E360 | Engine Coolant Temperature — High | Low coolant level, failed thermostat, or water pump issue | Diagnose cooling system; do not operate until resolved |
| E361 | Engine Coolant Temperature — Very High (Shutdown) | Severe cooling system failure | Engine shutdown required; perform full cooling system diagnosis |
| 110-0 | Engine Coolant Temp — Above Normal | Low coolant level or thermostat failure | Inspect cooling system, refill coolant, and test thermostat |
| 110-3 | Engine Coolant Temp Sensor — Voltage High | Open circuit or sensor failure | Check wiring and replace sensor if confirmed faulty |
| 174-3 | Engine Fuel Temperature — Voltage Above Normal | Open circuit in sensor wiring | Inspect harness and replace sensor if necessary |
| 190-8 | Engine Speed — Abnormal Frequency | Speed sensor air gap, sensor failure, or tone ring damage | Check sensor gap and test speed sensor and tone ring |
| 2458-2 | DPF #1 Differential Pressure — Erratic | Plugged pressure ports or failing sensor | Clean pressure ports and test sensor; verify DPF soot load |
| 41-3 | 8-Volt DC Supply — Voltage Above Normal | Short to power on 8V reference circuit | Inspect sensors sharing the 8V supply and isolate fault |
| 41-4 | 8-Volt DC Supply — Voltage Below Normal | Short to ground on 8V reference circuit | Disconnect sensors one at a time to locate short |
| 2348-9 | SAE J1939 Data Link #2 — Abnormal Update Rate | CAN bus wiring damage or termination fault | Check CAN wiring and measure termination resistance |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
CX35-P800 attachments & work tools
Power Take-Off (PTO) Drives
Available in basic and integral pump drive configurations. Integral drives are located at the 1 o'clock and 11 o'clock positions as viewed from the rear with a 1:1 ratio.
Rear Power Take-Off
Located at the 5 o'clock position as viewed from the rear. Features an 8 bolt mounting type and provides a 1.25:1 ratio with 1000 lb-ft (1360 N·m) rated torque.
Mounting and Output Systems
Input uses an SAE #1 dry flywheel housing with two SAE #2 side supports. Output options include 1810 yoke, 1810 companion flange, SPL 250 yoke, and ISO 8667-T180 flange.
Hydraulic and Oil System Options
Standard system uses Cat Transmission/Drive Train Oil-4 (TDTO). Optional equipment includes remote mount oil filters, remote mount ECU, and remote mount filter options.
Operational Modes
The transmission supports multiple modes including Auto pumper, Manual pumper, and Workover/drawworks configurations.
All CX35-P800 assemblies by section
Every catalogued assembly group for the Caterpillar CX35-P800. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Basic Transmission
347-1825 Option Ar-Power Train -Side Pto Drive
| 28***48 | Fastener Group-Coupling; -Engine | 1 |
| 30***81 | Module Group-Display; -Messenger | 1 |
| 30***80 | Control Group-Transmission | 1 |
347-1830 Option Ar-Power Train -Side Pto Drive
| 30***81 | Module Group-Display; -Messenger | 1 |
| 30***03 | Fastener Group-Tmsn Mounting; -Engine | 1 |
| 33***78 | Fastener Group-Xmsn Mounting | 1 |
347-1831 Option Ar-Power Train -Side Pto Drive
| 30***80 | Control Group-Transmission | 1 |
| 30***03 | Fastener Group-Tmsn Mounting; -Engine | 1 |
| 33***78 | Fastener Group-Xmsn Mounting | 1 |
347-1834 Option Ar-Power Train -Integral Pump Drive, Rear Pto
| 28***48 | Fastener Group-Coupling; -Engine | 1 |
| 30***80 | Control Group-Transmission | 1 |
| 30***03 | Fastener Group-Tmsn Mounting; -Engine | 1 |
351-0253 Option Ar-Power Train -Integral Pump Drive, Rear Pto
| 28***48 | Fastener Group-Coupling; -Engine | 1 |
| 30***50 | Transmission Ar-Complete; -Integral Pump Drive, Rear Power Take-Off | 1 |
| 30***80 | Control Group-Transmission | 1 |
347-1827 Option Ar-Power Train -Side Pto Drive
| 28***48 | Fastener Group-Coupling; -Engine | 1 |
| 30***81 | Module Group-Display; -Messenger | 1 |
| 30***03 | Fastener Group-Tmsn Mounting; -Engine | 1 |
347-1826 Option Ar-Power Train -Side Pto Drive, Rear Pto
| 28***48 | Fastener Group-Coupling; -Engine | 1 |
| 30***81 | Module Group-Display; -Messenger | 1 |
| 30***80 | Control Group-Transmission | 1 |
347-1829 Option Ar-Power Train -Side Pto Drive
| 30***81 | Module Group-Display; -Messenger | 1 |
| 30***80 | Control Group-Transmission | 1 |
| 30***03 | Fastener Group-Tmsn Mounting; -Engine | 1 |
347-1833 Option Ar-Power Train -Integral Pump Drive, Rear Pto
| 28***48 | Fastener Group-Coupling; -Engine | 1 |
| 30***81 | Module Group-Display; -Messenger | 1 |
| 30***50 | Transmission Ar-Complete; -Integral Pump Drive, Rear Power Take-Off | 1 |
347-1832 Option Ar-Power Train -Integral Pump Drive, Rear Pto
| 28***48 | Fastener Group-Coupling; -Engine | 1 |
| 30***81 | Module Group-Display; -Messenger | 1 |
| 30***50 | Transmission Ar-Complete; -Integral Pump Drive, Rear Power Take-Off | 1 |
347-1828 Option Ar-Power Train -Side Pto Drive
| 28***48 | Fastener Group-Coupling; -Engine | 1 |
| 30***80 | Control Group-Transmission | 1 |
| 30***03 | Fastener Group-Tmsn Mounting; -Engine | 1 |
299-2487 Planetary Gp-Transmission
| 03***53 | Seal-O-Ring; (08.92mm Id) | 1 |
| 0T***00 | Plug (.5625" Diameter) | 1 |
| 13***61 | Plate-Clutch | 5 |
344-6287 Transmission Ar-Complete -Integral Pump Drive, Rear Pto
| 25***65 | Cover Group-Shipping | 1 |
| 27***45 | Drive Group-Pump; -Rear Power Take-Off | 1 |
| 28***06 | Plate Group-Drive | 1 |
334-8602 Transmission Ar-Complete -8-Speed
| 25***65 | Cover Group-Shipping | 1 |
| 27***45 | Drive Group-Pump; -Rear Power Take-Off | 1 |
| 28***06 | Plate Group-Drive | 1 |
347-5402 Transmission Ar-Complete -Side Pto Drive
| 25***65 | Cover Group-Shipping | 1 |
| 28***06 | Plate Group-Drive | 1 |
| 28***49 | Fastener Group-Coupling; -Transmission | 1 |
346-9511 Transmission Ar-Complete -Side Pto Drive
| 25***65 | Cover Group-Shipping | 1 |
| 28***06 | Plate Group-Drive | 1 |
| 28***49 | Fastener Group-Coupling; -Transmission | 1 |
344-6286 Transmission Ar-Complete -Side Pto Drive, Rear Pto
| 25***65 | Cover Group-Shipping | 1 |
| 27***45 | Drive Group-Pump; -Rear Power Take-Off | 1 |
| 28***06 | Plate Group-Drive | 1 |
299-2484 Transmission Ar-Complete -8-Speed
| 25***65 | Cover Group-Shipping | 1 |
| 27***45 | Drive Group-Pump; -Rear Power Take-Off | 1 |
| 28***06 | Plate Group-Drive | 1 |
334-8603 Transmission Ar-Complete -8-Speed
| 25***65 | Cover Group-Shipping | 1 |
| 27***41 | Yoke Group | 1 |
| 28***06 | Plate Group-Drive | 1 |
346-9513 Transmission Ar-Complete -Side Pto Drive
| 25***65 | Cover Group-Shipping | 1 |
| 28***49 | Fastener Group-Coupling; -Transmission | 1 |
| 29***89 | Sensor Group-Liquid Level | 1 |
348-4154 Transmission Ar-Complete -Integral Pump Drive
| 25***65 | Cover Group-Shipping | 1 |
| 28***49 | Fastener Group-Coupling; -Transmission | 1 |
| 29***89 | Sensor Group-Liquid Level | 1 |
304-9050 Transmission Ar-Complete -Integral Pump Drive, Rear Pto
| 25***65 | Cover Group-Shipping | 1 |
| 27***45 | Drive Group-Pump; -Rear Power Take-Off | 1 |
| 28***06 | Plate Group-Drive | 1 |
334-8604 Transmission Ar-Complete -8-Speed
| 25***65 | Cover Group-Shipping | 1 |
| 27***45 | Drive Group-Pump; -Rear Power Take-Off | 1 |
| 28***49 | Fastener Group-Coupling; -Transmission | 1 |
346-9512 Transmission Ar-Complete -Side Pto Drive, Rear Pto
| 25***65 | Cover Group-Shipping | 1 |
| 27***45 | Drive Group-Pump; -Rear Power Take-Off | 1 |
| 28***06 | Plate Group-Drive | 1 |
347-5403 Transmission Ar-Complete -Side Pto Drive
| 25***65 | Cover Group-Shipping | 1 |
| 28***49 | Fastener Group-Coupling; -Transmission | 1 |
| 29***13 | Connector | 1 |
348-4155 Transmission Ar-Complete -Side Pto Drive, Rear Pto
| 25***65 | Cover Group-Shipping | 1 |
| 27***45 | Drive Group-Pump; -Rear Power Take-Off | 1 |
| 28***49 | Fastener Group-Coupling; -Transmission | 1 |
335-6630 Transmission Ar-Core -8-Speed
| 27***48 | Pump Group-Gear | 1 |
| 29***95 | Pan Group-Transmission Oil | 1 |
| 29***64 | Housing Group-Torque Converter | 1 |
335-6629 Transmission Ar-Core -8-Speed
| 27***48 | Pump Group-Gear | 1 |
| 29***95 | Pan Group-Transmission Oil | 1 |
| 29***22 | Housing Group-Torque Converter | 1 |
Electrical System
304-9099 Electronics Gp-Power Train
| 30***99 | Electronics Group-Power Train | 1 |
| 33***83 | Software Group-Power Train | 1 |
299-2489 Sensor Gp-Liquid Level
| 29***09 | Wire As | 1 |
| 29***89 | Sensor Group-Liquid Level | 1 |
| 31***48 | Bracket | 1 |
196-1185 Sensor Gp-Speed
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
| 17***49 | Strap; (Marker) | 1 |
| 18***35 | Pin-Connector; (16-Ga To 18-Ga) | 2 |
236-6222 Sensor Gp-Speed
| 19***05 | Sensor Group-Speed; (Secondary, Timing, Camshaft) | 1 |
| 22***47 | Seal-O-Ring | 1 |
| 23***22 | Sensor Group-Speed | 1 |
234-5013 Sensor Gp-Temperature
| 23***13 | Sensor Group-Temperature; -Air Inlet Manifold | 1 |
| 23***80 | Seal-O-Ring | 1 |
| 25***53 | Sensor As-Temperature; (Torque Converter Outlet Oil) | 1 |
325-0612 Switch Gp-Pressure -Differential
| 03***42 | Seal-O-Ring; (11.89mm Id) | 1 |
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
| 18***35 | Pin-Connector; (16-Ga To 18-Ga) | 2 |
344-1412 Wiring Gp-Transmission
| 12***74 | Tube-Heat Shrink; (5.72-mm Dia)(950-cm) | 0 |
| 12***75 | Tube-Heat Shrink; (7.44-mm Dia)(560-cm) | 0 |
| 12***76 | Tube-Heat Shrink; (17.78-mm Dia)(140-cm) | 0 |
Operator Station
298-3860 Control Gp-Transmission -Keypad Shifter
| 26***30 | Bracket-Mounting | 2 |
| 29***60 | Control Group-Transmission; -Keypad Shifter | 1 |
304-9080 Control Gp-Transmission
| 29***60 | Control Group-Transmission; -Keypad Shifter | 1 |
| 30***80 | Control Group-Transmission | 1 |
239-5025 Control Gp-Unprgmed Monitor -Messenger
| 12***12 | Screw-Pan Head; (8-16x0.32-In) | 1 |
| 23***24 | Control Group-Monitor; (Messenger) | 1 |
| 23***25 | Control Group-Unprgmed Monitor; -Messenger | 1 |
301-3081 Module Gp-Display -Messenger
| 23***25 | Control Group-Unprgmed Monitor; -Messenger | 1 |
| 30***81 | Module Group-Display; -Messenger | 1 |
Service Equipment And Supplies
304-9076 Film Gp
| 22***81 | Film-Warning; -Universal | 2 |
| 30***76 | Film Group | 1 |
| 33***02 | Film-Information; (Transmission Oil, Read Omm) | 1 |
304-9075 Film Gp
| 22***81 | Film-Warning; -Universal | 2 |
| 30***75 | Film Group | 1 |
| 33***02 | Film-Information; (Transmission Oil, Read Omm) | 1 |
Transmission Case &Amp; Mounting
250-5765 Cover Gp-Shipping
| 25***65 | Cover Group-Shipping | 1 |
| 30***24 | Clamp As | 3 |
| 5P***01 | Seal-O-Ring; (29.74mm Id)(Pump To Fitting As) | 2 |
304-9082 Cover Gp-Transmission
| 27***47 | Cover | 1 |
| 2H***34 | Seal Transfer Pump To Plate | 1 |
| 30***82 | Cover Group-Transmission | 1 |
304-9079 Cover Gp-Transmission -Pto
| 27***66 | Cover | 2 |
| 27***47 | Cover | 1 |
| 27***06 | Gasket | 2 |
306-6403 Fastener Gp-Tmsn Mounting -Engine
| 30***03 | Fastener Group-Tmsn Mounting; -Engine | 1 |
| 8T***60 | Washer-Hard (For Use With 7/16 In Bolts) | 24 |
| 8T***16 | Bolt-Plt; (7/16unc X 1 1/2) | 24 |
294-2695 Pan Gp-Transmission Oil
| 18***98 | Connector As | 2 |
| 23***82 | Seal-O-Ring | 1 |
| 23***84 | Seal; (35.6mm Od) | 1 |
Transmission Input
299-2466 Drive Gp-Pump
| 10***32 | Bearing As-Roller | 1 |
| 13***14 | Adapter-Pump | 2 |
| 14***44 | Shim Pack; (Includes 12-Shims) | 2 |
277-0445 Drive Gp-Pump -Rear Pto
| 09***16 | Ring-Retaining; (External) | 1 |
| 27***22 | Shaft As; (Rear Power Take-Off) | 1 |
| 27***45 | Drive Group-Pump; -Rear Power Take-Off | 1 |
289-9549 Fastener Gp-Coupling -Transmission
| 09***70 | Bolt-Socket Hd; (M12 X 1.75 X 45) | 12 |
| 28***49 | Fastener Group-Coupling; -Transmission | 1 |
289-9548 Fastener Gp-Coupling -Engine
| 0S***76 | Bolt 5.08 cm(2 In.) Long | 12 |
| 28***48 | Fastener Group-Coupling; -Engine | 1 |
294-2722 Housing Gp-Torque Converter
| 13***78 | Seal-O-Ring | 1 |
| 16***50 | Bolt; (M12x1.75x65-mm) | 13 |
| 1A***23 | Dowel (1" Long) | 1 |
299-2464 Housing Gp-Torque Converter
| 03***53 | Seal-O-Ring; (08.92mm Id) | 1 |
| 03***36 | Seal-O-Ring | 1 |
| 13***78 | Seal-O-Ring | 1 |
333-1741 Plate Gp-Drive
| 25***51 | Gear-Flywheel; (113-Teeth) | 1 |
| 28***97 | Plate-Washer | 1 |
| 28***98 | Plate-Flexible | 5 |
284-3606 Plate Gp-Drive
| 25***51 | Gear-Flywheel; (113-Teeth) | 1 |
| 28***97 | Plate-Washer | 1 |
| 28***98 | Plate-Flexible | 5 |
335-1064 Torque Converter Gp
| 09***70 | Bolt-Socket Hd; (M12 X 1.75 X 45) | 8 |
| 12***94 | Seal-O-Ring | 1 |
| 12***10 | Seal-O-Ring | 1 |
Transmission Oil System
299-2469 Control Gp-Transmission Hyd
| 03***53 | Seal-O-Ring; (08.92mm Id) | 1 |
| 03***28 | Seal-O-Ring | 1 |
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
341-8427 Control Gp-Transmission Hyd
| 03***53 | Seal-O-Ring; (08.92mm Id) | 1 |
| 03***28 | Seal-O-Ring | 2 |
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
341-8426 Control Gp-Transmission Hyd
| 03***53 | Seal-O-Ring; (08.92mm Id) | 1 |
| 03***28 | Seal-O-Ring | 1 |
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
304-9069 Control Gp-Transmission Hyd
| 03***53 | Seal-O-Ring; (08.92mm Id) | 1 |
| 03***28 | Seal-O-Ring | 2 |
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
304-9037 Filter & Mtg Gp-Oil -Transmission
| 06***61 | Seal-O-Ring (Id=40.87mm) | 2 |
| 13***29 | Seal-O-Ring | 1 |
| 13***00 | Clip; (Tab) | 1 |
304-8988 Gauge Gp-Oil Level (Dipstick)
| 23***35 | Seal-O-Ring | 1 |
| 29***17 | Adapter | 1 |
| 29***52 | Clamp | 1 |
277-0448 Pump Gp-Gear
| 10***86 | Seal-O-Ring | 2 |
| 16***42 | Bolt; (M10x1.5x55-mm) | 2 |
| 27***29 | Tube As | 1 |
284-4661 Pump Gp-Gear
| 09***58 | Bolt; (Socket Head) (M10x1.5x70mm) | 4 |
| 12***36 | Bearing-Sleeve | 4 |
| 26***51 | Body As-Pump | 1 |
244-7772 Valve Gp-Modulating -Transmission Clutch, Ecpc
| 16***08 | Washer; (13.03x25.4x2.38-mm Thk) | 1 |
| 21***68 | Seal-O-Ring; (11.89-mm Id) | 1 |
| 21***73 | Nut; (1/2-28-Thd) | 1 |
304-8999 Valve Gp-Relief -Transmission Hydraulic Control
| 11***50 | Cover | 2 |
| 14***79 | Spring-Compression | 1 |
| 16***67 | Fitting As; (Quick Disconnect, Male)(Quick Disconnect) | 3 |
Transmission Output
277-0441 Yoke Gp
| 27***60 | Retainer | 1 |
| 27***05 | Yoke | 1 |
| 27***41 | Yoke Group | 1 |
304-9006 Yoke Gp
| 27***60 | Retainer | 1 |
| 30***06 | Yoke Group | 1 |
| 30***07 | Yoke | 1 |
CX35-P800 serial number reference
The PIN plate is located on the machine frame or transmission housing. The 3-character prefix identifies the model and manufacturing factory; use this with the 5-digit sequence ID to verify exact build date and configuration via a dealer.
| Prefix | Identifies | Notes |
|---|---|---|
| PCZ | CX35-P800-C18I Petroleum Power Train Package | Identifies the petroleum package configuration for the CX35-P800 transmission paired with a C18I engine. Serial range begins at PCZ00001-UP. This prefix is specific to the C18I engine arrangement within the CX35-P800 product line. |
| TRJ | CX35-P800 Well Servicing Transmission | Identifies the machine serial range for the CX35-P800 transmission unit itself. Serial range begins at TRJ00001-UP. This prefix applies to the transmission assembly used in well servicing applications. |
Frequently asked questions
Which engines are compatible with the CX35-P800?
The transmission is optimized for use with Caterpillar C15 ACERT, C18 ACERT, and C27 ACERT (A ratings) engines.
What is the operating weight or power capacity of this unit?
The CX35-P800 provides a gross input power of 800 BHP (597 bkW) and a gross peak input torque of 2700 ft-lb (2700 N·m).
What is the electrical system voltage for this model?
The CX35-P800 is available in both 12V and 24V electrical system configurations.
What CX35-P800 owners discuss
What are the primary operational modes available for the CX35-P800 transmission?
Which engine series is the CX35-P800 optimized to use?
What are the rated power specifications for the CX35-P800?
What common electrical issues can affect Caterpillar heavy machinery systems?
What are the typical indicators of engine-related power loss in Caterpillar units?
What should be checked when inspecting a used CX35-P800 transmission?
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Need a specific CX35-P800 part?
Search live OEM part data, check fitment, and cross-reference alternatives with Heavy Parts AI.