Caterpillar AP-200B
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar AP-200B is a small, tracked mini asphalt paver Caterpillar built from roughly the mid-1990s to the mid-2000s, carrying serial prefix 2NK. Power comes from a Hatz 2M40, an air-cooled two-cylinder diesel with no ECM or electronic controls, rated around 26.1 kW (35 hp) at 3000 rpm from 1.72 L displacement. Operating weight without the screed runs about 4,080 kg (8,995 lb), carried on a steel crawler undercarriage with 380 mm (15 in) wide tracks. The bolt-on extendable screed starts at a 0.94 m (3.1 ft) base and widens to a 3.69 m (12.1 ft) maximum through bolt-on extensions, feeding off a roughly 178 mm (7 in) auger. It succeeded the earlier AP-200 (no B suffix, 6AD serial prefix), a distinct earlier catalog entry, and was sold as a compact machine for driveways, parking lots, utility trenches, and other small-format paving jobs below the scale of Caterpillar's highway-class pavers.
The B revision carried the same basic Hatz-powered mechanical driveline forward from the AP-200, and public documentation does not lay out a detailed factory changelog beyond the serial-prefix break, so treat any specific feature-by-feature difference between AP-200 and AP-200B as unconfirmed rather than settled fact. What is clear is that this is an old, low-volume, mechanically simple machine: no electronic engine or propel controls to fail, but also a shrinking pool of used units and a used market that skews toward buyers who specifically want a small, easy-to-maintain crawler paver without diagnostic electronics. Cat still lists factory parts support for the model, which keeps it serviceable today, but independent parts backup is thinner than for the larger 3116/3126-powered AP-1000 family, and buyers should expect to lean on OEM sourcing and general air-cooled-diesel expertise rather than dealer diagnostic tools.
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 AP-200B specifications
Engine
| Engine model | 2M40, 2-cylinder diesel |
| Gross power | 26.1 kW (35 hp) @ 3000 rpm |
| Net power | Not published for this model |
| Displacement | 1.72 L (104.8 cu in) |
| Cylinders | 2 |
| Emissions tier | Not documented for this model |
Weights
| Operating weight (without screed) | 4,080 kg (8,995 lb) |
| Shipping weight | Not published |
| Ground pressure | Not published |
Dimensions
| Transport length (without screed) | approx. 2.44-2.47 m (8.0-8.1 ft), figures vary slightly by source |
| Transport width | approx. 3.00-3.02 m (9.85-9.9 ft), figures vary slightly by source |
| Transport height | 2.19 m (7.17-7.2 ft) |
| Length of track on ground | 0.76 m (2.5 ft) |
| Track width | 38.1 cm (15 in) |
| Wheelbase / track gauge | Not published |
| Ground clearance | Not published |
Performance
| Travel speed, max | 3.4 km/h (2.1 mph) |
| Paving speed, max | 54.0 m/min (177.2 ft/min) |
| Paving width, standard | 0.94 m (3.1 ft) |
| Paving width, max | 3.69 m (12.1 ft) |
| Auger diameter | 17.8 cm (7 in) |
| Gradeability | Not published |
Service capacities (summary)
| Fuel tank | 40.1 L (10.6 gal) |
| Hydraulic system | 76.1 L (20.1 gal) |
| Engine oil | Not published for this model |
| Cooling system | Not published for this model |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
AP-200B fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | Not documented for this exact machine in public sources. The AP-200B runs a Hatz 2M40 air-cooled, 2-cylinder direct-injection diesel (26.1 kW / 35 hp at 3000 rpm). Air-cooled Hatz twins of this displacement class typically hold roughly 2.5-3.0 L (0.7-0.8 US gal) including the filter, but confirm against the engine dataplate and the Hatz engine manual fitted to this unit before service. | Follow the Hatz engine operation manual carried with this unit. General-duty diesel engine oil, API CD/CE class or later, SAE 15W-40 for temperate climates; SAE 10W or a 10W-30 multigrade for cold-start conditions below 0 C (32 F). |
| Cooling system | Not applicable - the Hatz 2M40 is air-cooled, no liquid coolant system is fitted. | None required. Cooling is by finned cylinders and flywheel fan; no antifreeze or coolant is used on this engine. |
| Fuel tank | 40.1 L (10.6 US gal) | No. 2-D diesel fuel for normal operating temperatures. Switch to No. 1-D diesel or a winter-blend fuel in cold weather to prevent fuel waxing and gelling. |
| Hydraulic system (tank and circuit) | 76.1 L (20.1 US gal) | Cat HYDO (Caterpillar Hydraulic Oil). Where the paver's screed, auger, and drive circuits share a common reservoir, Cat TDTO (Transmission/Drive Train Oil) is the accepted alternative fill on this class of small paver. Viscosity by climate: SAE 10W in cold weather, SAE 30 or a 10W-30 multigrade in temperate-to-warm conditions. |
| Power train / drive compartments (track or wheel drive, as fitted) | Not documented in available public sources for the AP-200B power train group. Cat offered this paver in steel-track, rubber-track, and wheeled configurations, and compartment capacity varies by that configuration. | Cat TDTO (Transmission/Drive Train Oil), per general Cat paver drive-train practice - confirm exact grade and quantity against the OMM for the specific track/wheel configuration on this unit. |
| Grease (spec only) | Not applicable - service item, no reservoir capacity. | Cat Multipurpose Grease (NLGI 2, lithium-complex base) or an equivalent EP multipurpose grease, applied at all screed, conveyor, auger, and drive linkage grease fittings. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar AP-200B maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
Servicing the AP-200B beyond the schedule
Predictive Maintenance & Fluid Analysis
The AP-200B has no ECM, so there is no fault-code history to trend. Predictive care means sampling engine oil at every change interval on the Hatz 2M40 and watching for early wear-metal counts, since there is no coolant loop to sample on this air-cooled block. Track hydraulic oil condition on the propel, auger, and screed circuits closely, because pump or motor wear will only show up as a gauge reading, a warning lamp, or a performance complaint, never a stored code.
Corrective & Common Repairs
Typical AP-200B repairs center on the bolt-on screed extension hardware working loose or wearing at the joints from repeated width changes, auger and conveyor feed components wearing from abrasive mix contact, and track pad wear from constant low-speed creep operation. The air-cooled Hatz 2M40's cooling fins clog with asphalt dust and cause overheating if not cleared. Propel pump and motor seals are also a recurring leak point on higher-hour units.
Overhaul & Rebuild Points
Most surviving AP-200B units are now well past 1995-2005 build dates, so overhaul planning centers on the undercarriage (track chain, rollers, idlers) reaching end of wear life, the Hatz 2M40's top end needing a ring-and-valve rebuild with no ECM history to time it by, the propel pump and motor needing an internal rebuild, and the screed mainframe needing straightening where bolt-on extensions have racked the frame over years of width changes.
Seasonal & Environment Servicing
Keep the air-cooled engine's fins and fan shroud clear of asphalt dust year-round; heat buildup is the main environmental risk on this engine, not coolant loss. Check screed heater elements before each paving season so the screed reaches working temperature evenly at startup. In cold storage, de-tension tracks to avoid flat-spotting, stabilize fuel, and protect exposed hydraulic rod surfaces from corrosion until the next season.
AP-200B common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 081-3242 | Filter-Fuel | Fuel system service | Check fitment → |
| 1G-7202 | Filter-Fuel | Fuel system service | Check fitment → |
| 1G-7206 | Filter-Fuel | Fuel system service | Check fitment → |
| 1G-7197 | Filter Element As-Air | Air intake service | Check fitment → |
| 077-5232 | Filter Element-Breather | Hydraulic service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
AP-200B fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| Oil pressure lamp (red, oil-can symbol) | Engine lubrication pressure has dropped below the safe minimum | Low oil level, clogged oil filter, worn or failing oil pump, oil galley leak | Stop the engine immediately, check oil level and filter condition before restarting |
| Charge/alternator lamp (battery symbol) | Alternator is not charging the battery while the engine runs | Loose or broken drive belt, worn alternator brushes/diodes, loose or corroded wiring connection | Check belt tension and condition first, then test alternator output and wiring |
| Air filter restriction indicator | Air intake filter element is dirty enough to restrict airflow | Clogged paper/dry-element air filter from job-site dust, overdue service interval | Inspect the element, clean or replace as needed, check for a torn element or unsealed housing |
| Engine overheat / high cylinder-head-temperature lamp | Engine running hotter than the air-cooling system can handle | Cooling fins or shrouding packed with dust/debris, low oil level (oil also carries heat away on this air-cooled design), sustained overload | Shut the engine down at once, let it cool, clear the fan shrouding and cooling fins, recheck oil level before restart |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
AP-200B attachments & work tools
Screed and bolt-on extensions
Standard screed pours a base width around 0.94 m (3.1 ft). Bolt-on mainframe extensions widen the mat up to a maximum of about 3.69 m (12.1 ft), the figure repeated across independent spec sheets for this class of mini paver. No named screed series (like the larger track pavers' current lineup) is documented for this specific unit.
Auger / material feed system
Feed auger diameter is about 178 mm (7 in). Auger extension sections are added in step with screed mainframe extensions so material delivery keeps pace with the wider strike-off; this is the standard pairing on Cat's small track pavers of this era, not a separate optional kit.
Undercarriage
AP-200B rides on steel crawler tracks, about 380 mm (15 in) wide, with roughly 0.76 m (2.5 ft) of track on the ground. No rubber-tired variant is documented for this model; the track chassis and screed form one integrated unit rather than a machine with a swappable quick-coupler front end.
Mounting / coupler system
This paver has no quick-coupler or work-tool interface in the excavator/loader sense. The screed bolts directly to the tractor's pull arms and towpoint, and width changes are made with mainframe/screed extension hardware rather than a detachable tool system.
Screed heat and width adjustment
Cat's asphalt-paver line generally offers hydraulic variable-width screed adjustment and electrically heated screed plates, but this level of factory-option detail is not confirmed in surviving documentation for the AP-200B specifically. Treat as likely-but-unverified for this exact serial range and confirm with a dealer before ordering heat or extension hardware.
Power unit relevant to attachment load
Engine is a Hatz 2M40, air-cooled 2-cylinder diesel rated about 26 kW (35 hp) at 3000 rpm. This is a small power package for the class, which is consistent with why paving-width extensions on this model are modest bolt-on sections rather than large hydraulically telescoping wings seen on bigger pavers.
Guarding and factory configuration options
No model-specific guarding or factory configuration options (canopy, operator platform variants, lighting packages) are documented for the AP-200B in available literature. This is an older, discontinued mini paver (roughly mid-1990s to mid-2000s) with thin public documentation; verify any option list against the machine's own parts book and serial number.
All AP-200B assemblies by section
Every catalogued assembly group for the Caterpillar AP-200B. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Basic Engine
6r-1685 Support Gp-Engine -Engine
| 06***47 | Washer-Retaining; (19.8x76x6-mm Thk) | 3 |
| 2H***90 | Nut; (3/4-10-Thd) | 3 |
| 6R***25 | Mounting As | 1 |
Braking System
103-0000 Brake Gp-Service
| 08***53 | Spring | 6 |
| 10***93 | Shaft | 1 |
| 10***94 | Ring | 1 |
6r-3596 Brake Gp-Service
| 08***77 | Adapter | 1 |
| 12***39 | Brake Group-Service | 2 |
| 1G***20 | Hose As | 1 |
6r-3499 Brake Gp-Service
| 08***53 | Spring | 6 |
| 1G***66 | Kit-Spring | 1 |
| 1G***67 | Kit-Seal | 1 |
123-9239 Brake Gp-Service
| 08***53 | Spring | 4 |
| 10***93 | Shaft | 1 |
| 10***94 | Ring | 1 |
7x-2249 Valve Gp-Brake Control
| 08***80 | Case As | 1 |
| 08***83 | Body | 1 |
| 08***84 | Coil | 1 |
Electrical And Starting System
6r-3360 Connection Gp-Electrical -(Engine)
| 6R***60 | Connection Group-Electrical; -(Engine) | 1 |
| 7G***17 | Plug-Seal | 1 |
| 7G***18 | Plug-Seal | 2 |
6r-2736 Panel Gp-Switch
| 03***66 | Switch Group-Magnetic; (Start Relay) | 1 |
| 08***41 | Switch; (Machine/Engine Remote Stop) | 1 |
| 08***48 | Block - Contact | 1 |
7n-0718 Switch Gp-Disconnect -Battery
| 2H***22 | Lockwasher | 2 |
| 6F***45 | Nut-Full; (3/8-24-Thd) | 2 |
| 7N***18 | Switch As-Disconnect; -Battery-Ground Level | 1 |
9g-7641 Switch Gp-Start -Engine, Key
| 6V***62 | Screw-Machine; (8-32x0.31-In) | 4 |
| 7T***99 | Nut-Mounting; (1-32-Thd) | 1 |
| 9B***33 | Lockwasher; (Int'L Tooth) | 4 |
6r-1820 Wiring Gp-Machine
| 03***50 | Locknut, Hex., 1/4in.-20 N.C. | 4 |
| 09***66 | Washer; (Hard) (4.5x9x1mm Thk) | 2 |
| 10***01 | Rod | 2 |
Engine Arrangement
172-7050 Engine Ar
| 08***44 | Gauge; (Oil Level) | 1 |
| 08***84 | Filter-Engine Oil | 1 |
| 08***42 | Filter-Fuel; (Secondary) | 1 |
6r-1684 Engine Ar
| 08***84 | Filter-Engine Oil | 1 |
| 08***42 | Filter-Fuel; (Secondary) | 1 |
| 08***60 | Belt; (Turbine) | 1 |
Feeder Drag And Auger Conveyors
1c-4320 Actuator Gp
| 07***68 | Gear | 1 |
| 07***99 | Capscrew; (Housing) | 4 |
| 07***98 | Motor | 1 |
7x-9811 Auger Gp
| 07***55 | Bearing | 2 |
| 07***81 | Motor Group-Hydraulic; S/N 6ad1-264 | 2 |
| 09***30 | Auger; (Rh) | 1 |
Frame And Body
6r-1829 Frame As-Main
| 08***85 | Support | 1 |
| 10***35 | Key-Square; (3/16in X 3/4in Lg) | 2 |
| 1K***72 | Locknut Horn To Guard | 1 |
6r-1862 Frame Gp-Screed
| 07***55 | Ring; (Retaining) | 8 |
| 07***42 | Bolt | 4 |
| 07***55 | Bearing | 2 |
1g-5513 Guard Gp-Lines
| 10***13 | Guard As | 1 |
| 15***94 | Tie-Hose | 8 |
| 16***48 | Sleeve-Abrasion | 0 |
6r-3673 Handrail Gp
| 6R***72 | Handrail As | 1 |
| 6R***73 | Handrail Group | 1 |
| 6V***01 | Nut; (3/8-16-Thd)(Plate To Rh And Lh Bracket As) | 8 |
Fuel System
6r-3355 Burner Gp
| 00***47 | Elbow; (Rh Side) | 1 |
| 00***33 | Tee-Pipe | 1 |
| 03***49 | Nut-Self Lock; (No.10.Unc) | 4 |
6r-1839 Control Gp-Governor
| 0L***70 | Handle-Lever | 2 |
| 1A***09 | Capscrew (3/8 - 24 Nf X 1 1/4 Gd8, Hex) | 2 |
| 1K***72 | Locknut Horn To Guard | 1 |
6r-1823 Lines Gp-Fuel
| 03***48 | Clip; (11.11mm .437in Id) | 1 |
| 08***86 | Clamp | 2 |
| 12***78 | Valve As-Shutoff | 1 |
6r-3362 Spray Gp-Fuel
| 00***86 | Connector-Hose (1/4-18nptf Thd) | 1 |
| 1G***44 | Nozzle | 1 |
| 1G***45 | Valve As-Spray | 1 |
150-7666 Tank Gp-Fuel
| 08***32 | Cap | 1 |
| 15***05 | Tank As-Fuel | 1 |
| 15***66 | Tank Group-Fuel | 1 |
6r-1825 Tank Gp-Fuel
| 08***32 | Cap | 1 |
| 6R***03 | Gasket | 1 |
| 6R***55 | Cover As | 1 |
Hydraulic System
077-3951 Cap Gp-Hydraulic Oil Filler
| 07***51 | Cap As-Filler Breather | 1 |
| 07***32 | Filter Element-Breather; (Hydraulic Oil Filter) | 1 |
| 07***26 | Gasket | 2 |
6r-1849 Control Gp-Valve
| 1G***60 | Lever As-Modulating | 3 |
| 2L***38 | Locknut; (1/4-28-Thd) | 4 |
| 4K***77 | Clip-On Side & Top Of Rear Of Engine For | 3 |
6r-1827 Cooler Gp-Hydraulic Oil
| 03***75 | Cooler As-Oil | 1 |
| 1G***09 | Bracket-Motor | 2 |
| 1G***10 | Motor | 1 |
6r-2392 Cylinder Gp-Hydraulic -Hydraulic
| 1G***75 | Ring-Retaining | 1 |
| 1G***76 | Kit-Seal | 1 |
| 1G***78 | Seal | 1 |
6r-2393 Cylinder Gp-Hydraulic -Hydraulic
| 03***27 | Ring-Back-Up | 1 |
| 07***86 | Lockwire | 1 |
| 1G***93 | Kit-Seal | 1 |
6r-1859 Cylinder Gp-Hydraulic
| 1G***28 | Pin | 2 |
| 6R***59 | Cylinder Group-Hydraulic | 1 |
| 6R***93 | Cylinder Group-Hydraulic; -Hydraulic | 1 |
6r-3001 Cylinder Gp-Hydraulic
| 1G***74 | Ring-Retaining | 1 |
| 1G***77 | Kit-Seal | 1 |
| 1G***79 | Seal | 1 |
6r-3002 Cylinder Gp-Hydraulic
| 09***29 | Lockwire | 1 |
| 1G***33 | Ring-Back-Up | 3 |
| 1G***88 | Kit-Seal | 1 |
6r-1860 Cylinder Gp-Hydraulic
| 07***11 | Pin | 2 |
| 1D***06 | Nut 13.89 mm (.546 In.) | 2 |
| 1G***22 | Pivot As | 2 |
6r-1842 Hydraulic Ar
| 08***70 | Tank Group-Hydraulic | 1 |
| 10***40 | Valve Group-Bank | 1 |
| 1G***13 | Guard Group-Lines | 1 |
6r-1850 Lines Gp-Auger
| 03***55 | Locknut; (5/16-18-Thd)(Marked X) | 4 |
| 1G***71 | Rod-Threaded | 1 |
| 1G***72 | Rod-Threaded | 1 |
6r-1858 Lines Gp-Extension
| 03***55 | Locknut; (5/16-18-Thd)(Marked X) | 2 |
| 3J***07 | Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve | 4 |
| 3K***60 | Seal Pilot Manifold On; Seal To Boom Check Valve Drain | 4 |
6r-1856 Lines Gp-Gate
| 1G***65 | Hose As | 1 |
| 3J***07 | Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve | 4 |
| 3K***60 | Seal Pilot Manifold On; Seal To Boom Check Valve Drain | 4 |
6r-1855 Lines Gp-Hopper
| 1G***86 | Clamp | 1 |
| 1G***48 | Plate | 1 |
| 1G***74 | Rod-Threaded | 1 |
6r-1852 Lines Gp-Hydraulic
| 2S***78 | Seal-O-Ring (Id=37.47mm) | 2 |
| 3D***24 | O-Ring - For Oil Drain & Level Plug (Items 3 & 7) | 1 |
| 5K***90 | Seal-To Hydraulic Cooler Inlet Port | 6 |
6r-1851 Lines Gp-Hydraulic
| 2M***80 | Seal--To Connector Pump Outlet | 4 |
| 6R***51 | Lines Group-Hydraulic | 1 |
| 6R***90 | Hose As | 1 |
6r-3032 Lines Gp-Hydraulic
| 03***55 | Locknut; (5/16-18-Thd)(Marked X) | 1 |
| 09***38 | Hose As | 1 |
| 2M***80 | Seal--To Connector Pump Outlet | 3 |
6r-1853 Lines Gp-Hydraulic Oil Cooler
| 01***24 | Bushing To Supply Port | 1 |
| 05***26 | Tee | 1 |
| 3D***24 | O-Ring - For Oil Drain & Level Plug (Items 3 & 7) | 3 |
6r-1857 Lines Gp-Screed
| 1G***65 | Elbow; (Orifice) | 1 |
| 3J***07 | Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve | 2 |
| 3K***60 | Seal Pilot Manifold On; Seal To Boom Check Valve Drain | 2 |
077-7189 Motor Gp-Piston
| 00***98 | Bearing | 2 |
| 07***89 | Motor Group | 1 |
| 07***64 | Housing | 1 |
6r-2203 Motor Gp-Gear
| 1G***84 | Kit-Seal | 1 |
| 1G***85 | Bearing As | 2 |
| 1G***86 | Flange | 1 |
078-0381 Motor Gp-Gerotor
| 07***81 | Motor Group-Hydraulic; S/N 6ad1-264 | 1 |
| 09***39 | Key | 1 |
| 11***64 | Plate | 4 |
8i-0632 Motor Gp-Piston
| 00***98 | Bearing | 2 |
| 08***22 | Ring-Snap | 1 |
| 08***23 | Race | 1 |
6r-1848 Mounting Gp-Valve
| 4L***54 | Capscrew; (3/8-16x21 In) (Gd8) (Hex Hd) (4-Roller) | 3 |
| 6R***48 | Mounting Group-Valve | 1 |
| 8T***96 | Washer-Hard- Line From Pipe As. To Gear | 3 |
6r-3247 Pump Gp-Gear
| 1G***75 | Kit-Seal | 2 |
| 4L***54 | Capscrew; (3/8-16x21 In) (Gd8) (Hex Hd) (4-Roller) | 2 |
| 5P***63 | Seal-O-Ring | 1 |
138-2638 Pump Gp-Piston
| 00***71 | Cone-Bearing | 4 |
| 07***53 | Pin; (Spring) | 6 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 2 |
6r-1689 Pump Gp-Piston
| 06***60 | Ring-Retaining | 2 |
| 07***53 | Pin; (Spring) | 6 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 2 |
087-1470 Tank Gp-Hydraulic
| 07***71 | Gauge; (Hydraulic Oil Level) | 2 |
| 07***51 | Cap As-Filler Breather | 1 |
| 08***70 | Tank Group-Hydraulic | 1 |
106-3333 Valve Gp-Bank
| 08***61 | Valve As; (Mid-Inlet) | 1 |
| 09***94 | Seal-O-Ring | 11 |
| 10***08 | Valve-Relief | 3 |
105-1536 Valve Gp-Bank
| 08***56 | Tie Rod | 2 |
| 08***59 | Tie Rod | 1 |
| 08***61 | Valve As; (Mid-Inlet) | 1 |
109-0340 Valve Gp-Bank
| 10***33 | Valve Group-Bank | 1 |
| 10***40 | Valve Group-Bank | 1 |
| 1G***75 | Boot | 2 |
082-2633 Valve Gp-Selector
| 07***85 | Knob | 1 |
| 08***33 | Valve Group-Selector | 1 |
| 09***67 | Lockwasher | 1 |
6r-3472 Valve Gp-Vibratory
| 08***33 | Valve Group-Selector | 1 |
| 6R***72 | Valve Group-Vibratory | 1 |
| 8C***21 | Bolt-Plt; (5/16unc X 1 1/2) | 2 |
Implements
7r-6732 Plate Gp-Screed Cutoff
| 08***83 | Shield-Gate | 1 |
| 08***50 | Cut Off | 1 |
| 08***51 | Plate | 1 |
6r-4026 Roller Gp-Push
| 07***37 | Bearing | 2 |
| 07***85 | Roller As | 2 |
| 07***12 | Shaft-Governor Control | 2 |
Operator Station
6r-1694 Control Gp-Direction & Speed -Speed & Direction
| 03***72 | Bolt; (3/8-16-Thd) | 12 |
| 07***33 | Pad | 8 |
| 08***53 | Spring | 4 |
7r-6731 Kit-Seat
| 07***15 | Seat | 2 |
| 5E***63 | Mount As | 4 |
| 6V***89 | Nut-Full (5/16 X 18 Thd) | 4 |
6r-2725 Panel Gp-Instrument
| 03***49 | Nut-Self Lock; (No.10.Unc) | 1 |
| 03***14 | Screw; (10-32x1-In) | 2 |
| 03***97 | Boot | 1 |
Power Train
6r-1843 Cooler Gp-Transmission Oil
| 10***68 | Frame As | 1 |
| 1G***53 | Shroud As-Cooler | 1 |
| 4M***61 | Bolt-To Assemble Valve As And Plates | 6 |
6r-3471 Filter Gp-Oil
| 07***58 | Filter-Oil; (Advanced Efficiency) | 1 |
| 4M***25 | B. 5/16 N.C. X 1" | 4 |
| 5H***36 | Reducer | 1 |
6r-4027 Indicator Gp-Steering
| 08***48 | Indicator As | 2 |
| 08***49 | Screw | 2 |
| 6R***27 | Indicator Group-Steering | 1 |
6r-1693 Lines Gp-Propel -Hydraulic
| 07***72 | Valve; (Bleed 0ff) | 2 |
| 1G***08 | Hose As | 1 |
| 1G***09 | Hose As | 1 |
082-2624 Planetary Gp-Final Drive
| 03***60 | Cup-Roller Bearing | 1 |
| 03***61 | Cone-Roller Bearing | 1 |
| 07***42 | Roller | 84 |
6r-1688 Transmission Gp
| 13***38 | Pump Group-Piston | 1 |
| 3J***07 | Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve | 4 |
| 3K***15 | Seal-O-Ring (Id=101.27mm) | 2 |
Service Equipment And Supplies
1g-5529 Plate & Film Gp
| 07***69 | Handle; (Manual Operating) | 1 |
| 08***17 | Film-Instruction; (Manuals Inside) | 1 |
| 10***19 | Film-Instruction | 1 |
Undercarriage
077-3622 Track Gp
| 07***39 | Bushing-Terminal | 136 |
| 07***10 | Bushing-Terminal | 102 |
| 07***22 | Track As | 1 |
6r-1700 Track Gp -Rh
| 07***89 | Pin | 1 |
| 07***22 | Track As | 1 |
| 07***81 | Bearing As | 2 |
6r-1821 Track Gp -Lh
| 07***89 | Pin | 1 |
| 07***22 | Track As | 1 |
| 07***81 | Bearing As | 2 |
AP-200B serial number reference
The PIN/serial plate sits on the paver tractor frame, usually on the chassis rail near the engine compartment or operator platform, sometimes repeated on a plate near the fuel tank. Read the first three characters as the serial prefix (identifies the model/build series), followed by a 5-digit sequence number; on this paver the plate is stamped or riveted metal rather than a barcoded 17-character PIN.
| Prefix | Identifies | Notes |
|---|---|---|
| 2NK | AP-200B compact asphalt paver, Hatz-powered configuration | Only documented prefix for the AP-200B (2NK00001-UP). Machine is fitted with a Hatz air-cooled 2-cylinder diesel, roughly 26 kW (35 hp) class, same engine family as the 2M30/2M40/2M41/2L30Z/4M40/4M41/H3L30S Hatz units used on related Cat compaction rollers. Not the same paver line as the larger C-series/3100-series-engine AP-1000/AP-1050/AP-1055 family; do not borrow engine or chassis data from those. Predecessor base model AP-200 (no B suffix) uses a separate prefix, 6AD, and is a different catalog entry. |
Frequently asked questions
What engine does the Caterpillar AP-200B use?
A Hatz 2M40, an air-cooled two-cylinder diesel rated around 26.1 kW (35 hp) at 3000 rpm with 1.72 L displacement. It is not a Cat-branded engine and carries no ECM or electronic controls.
What is the operating weight of the AP-200B?
About 4,080 kg (8,995 lb) without the screed. Actual in-service weight varies with the screed and any bolt-on width extensions fitted.
What replaced the Caterpillar AP-200B?
Not clearly documented in public sources. Caterpillar's tracked paver lineup moved on to larger, later Cat and BG-sourced pavers, but no specific model is confirmed as a direct successor to the AP-200B. Check with a Cat dealer for the current small-paver equivalent.
What AP-200B owners discuss
What's the biggest recurring wear item on an AP-200B undercarriage?
Any known quirks with the Hatz 2-cylinder air-cooled diesel in this paver?
What hydraulic behavior should I expect to troubleshoot?
What electrical or sensor problems come up most?
Why does the mat show streaking behind the screed?
What should I check when buying a used AP-200B?
Is there anything safety-related to watch for on the screed and folding sections?
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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