This document is a service manual for the CASE CX290B Crawler Excavator, providing detailed information for maintenance, repair, and operation.

General Information

The manual begins with general safety information and standard torque specifications for cap screws and nuts. It emphasizes the importance of following safety messages, using appropriate personal protective equipment, and adhering to specified procedures for checks and tests. It also provides guidelines for cleaning, inspection, and lubrication of components, stressing the use of genuine Case service parts and specified oils and lubricants to ensure proper functioning and warranty coverage.

Cleaning: All metal parts, except bearings, should be cleaned in a suitable solvent or by steam cleaning, avoiding caustic soda. After cleaning, parts should be dried and oiled. Oil passages should be cleaned with compressed air. Bearings should be cleaned in a suitable solvent, air-dried (not with compressed air), and then oiled.

Inspection: All disassembled parts must be inspected for wear or damage. Worn or damaged parts should be replaced. Minor scoring or grooves can be removed with a hone or crocus cloth. A visual inspection is crucial to identify wear, pitting, or other damage that could lead to early failures.

Bearings: Bearings should be checked for smooth action. If a bearing is loose or rough, it must be replaced. After washing in a suitable solvent, bearings should be air-dried and oiled. For needle bearings, any metal protrusions in the bore or edge must be removed before pressing them into position. Petroleum jelly should be applied to the inside and outside diameters of needle bearings before installation.

Gears: All gears must be checked for wear and damage, and replaced if necessary.

Oil seals, O-rings, and gaskets: Always install new oil seals, O-rings, and gaskets, applying petroleum jelly to them during installation.

Shafts: Shafts should be inspected for wear or damage, particularly on bearing and oil seal surfaces.

Service parts: Only genuine Case service parts should be used. The Parts Catalog should be consulted for correct part numbers. Failures resulting from the use of non-genuine parts are not covered by warranty.

Lubrication: Only oils and lubricants specified in the Operator's or Service Manuals should be used. Failures due to the use of non-specified oils and lubricants are not covered by warranty.

Safety Information

The manual uses a warning symbol to highlight important safety messages, indicating a risk of serious injury or death if not followed. Key safety instructions include:

Reading the operator's manual for correct control functions.
Operating machine controls only from the seat position.
Wearing appropriate safety equipment (hard hat, safety shoes, ear protection, eye protection, heavy gloves, reflector clothing) and avoiding loose clothing, especially when working near the fan belt.
Following written procedures for hydraulic checks and tests, and ensuring all personnel are clear when cycling hydraulic cylinders.
Using insulated gloves when working with hot parts.
Lowering attachments to the ground or supporting them with stands during maintenance.
Maintaining a clean work area, free of oil, water, grease, and tools.
Using suitable lifting equipment for heavy components.
Being aware that pin-sized streams of hydraulic oil under pressure can penetrate the skin, requiring immediate medical attention. Hoses and tubes should be kept in good condition, and leaks should be checked with cardboard or wood, not hands.
Removing hardened pins or shafts with a soft-head hammer (brass or bronze) or a brass/bronze driver with a steel-head hammer.
Wearing eye protection that completely encloses the eyes when using a hammer, compressed air, or grinder to remove or install pivot pins or separate parts.
Using suitable floor jacks or chain hoists to raise wheels or tracks, and blocking the machine with safety stands.
Preventing battery electrolyte from freezing by keeping the battery at full charge, as a frozen battery can explode if charged or jump-started.
Ensuring adequate ventilation when running the engine in enclosed spaces to avoid engine exhaust fumes, which can cause death.

Standard Torque Data for Cap Screws and Nuts

The manual specifies tightening procedures for cap screws and nuts, emphasizing alternating tightening to ensure even torque application. For cap screws where Loctite was used, cleaning with light oil or solvent and drying is required before applying 2-3 drops of Loctite to the threads and tightening. A torque table provides specific values for different screw sizes (M6 to M20) in both Nm and lb-ft, along with corresponding spanner sizes.

Specifications and Special Torque Settings

This section details the technical specifications of the CX290B Crawler Excavator, including type, serial number, fluids, lubricants, main data, performance, dimensions, component weights, and wear limits for the track assembly and attachment mobile joints.

Type, Serial Number, and Year of Manufacture: The manual instructs users to provide the machine's type, serial number, year of manufacture, and serial numbers of hydraulic and mechanical components when ordering parts or seeking assistance. A sample identification plate is shown.

Fluids and Lubricants: Lubricants must have correct properties for each application, and conditions of use must be respected.

Hydraulic fluid: CASE/AKCELA hydraulic fluid is recommended. The type varies with ambient temperature:
- Temperate climates (-20°C to +40°C): HYDRAULIC EXCAVATOR FLUID (MS 1230. ISO VG 46. DIN 51524 PART 2 HV).
- Hot climates (0°C to +50°C): AW HYDRAULIC FLUID 68 HV (MS 1216. ISO VG 68. DIN 51524 PART 3 CATEGORY HVLP).
- Cold climates (-25°C to +20°C): AW HYDRAULIC FLUID 32 (MS 1216. ISO VG 32. DIN 51524 PART 2).
- Biodegradable fluid (-30°C to +40°C): HYDRAULIC EXCAVATOR FLUID BIO (MS 1230. ISO VG 46. DIN 51524 PART 2 HV). This fluid is miscible with standard fluid, but complete draining is advised when changing from standard fluid.
Transmission component oil: Extreme pressure oil for enclosed transmissions: GEAR 135H EP (SAE 80W-90. API GL 5. MIL-L-2105 D. MS 1316. ZF TE-ML 05A).
Grease:
- MOLY GREASE 251H EP-M (251H EP-M. NLGI 2): "Extreme Pressure" multipurpose grease with lithium soap and molybdenum disulphide.
- MULTIPURPOSE GREASE 251H EP (251H EP. NLGI 2): "Extreme Pressure" multipurpose grease with lithium soap and calcium.
- PREMIUM GREASE EP2 (NLGI 2): "Extreme Pressure" multipurpose grease with lithium soap.
- For hydraulic breakers: MULTIPURPOSE GREASE 251H EP (NLGI 2).

Engine Oil: CASE/AKCELA No. 1 engine oil is recommended for all operating conditions. If unavailable, use oils corresponding to ACEA E7 or API CI-4 categories. An oil viscosity/oil range chart is provided, showing suitable SAE grades (10W, 20W, 30, 40, 10W30, 10W40, 10W60, 15W40, 20W60, 5W30, 0W30) for various ambient temperatures, distinguishing between mineral, semi-synthetic, and synthetic bases.

Fuel: Use ASTM D975 grade No. 2-D fuel. Using other fuel types can lead to power loss and high consumption. For cold weather (below -7°C), a mixture of No. 1-D and No. 2-D fuels is provisionally approved. Fuel must be free from dust, have proper viscosity, high cetane number, good fluidity at low temperatures, low sulfur content, and very little residual carbon. Recommended standards include JIS No. 2, DIN 51601, SAE-J-313C No. 2-D, and BS/2869-1970 Class A-1. Using non-recommended fuels can damage the fuel injection system and engine, voiding the warranty. Used engine oil should not be mixed with diesel fuel. Fuel additives should be used only after consulting a supplier or CASE Dealer. The fuel tank should be filled at the end of the day in cold weather to prevent condensation. Fuel storage tanks should be placed outdoors, kept cool, and drained regularly to remove water and impurities.

Anti-freeze/Anti-corrosion: Use anti-freeze in all seasons for cooling system protection. CASE/AKCELA: PREMIUM ANTI-FREEZE (MS 1710) is recommended. For temperatures down to -38°C, mix 50/50 with water. Do not mix products of different origins or brands.

Environment: Emphasizes environmental responsibility: do not dispose of used fluids or lubricants on the ground or in leaking receptacles. Contact local recycling centers or CASE Dealers for proper disposal methods.

Plastic and Resin Parts: When cleaning plastic parts (console, instrument panel, indicators), use only water, soap, and a soft cloth. Avoid petrol, kerosene, or paint solvents, as they can cause discoloration, cracks, or deformation.

Main Data

Model Name: CX290B Hydraulic Excavator Operating Weight: 29800 kg (65698 lbs) Engine Output: 154 kW / 1800 rpm

Performance

Swing Speed: 10.2 Tr/min. Travel Speed: Low Speed 3.2 km/h (1.99 mph), High Speed 5.6 km/h (3.48 mph) Maximum Drawbar Pull: 233.2kN (52425.45 lbf) Grade Ability: 70% (35°) Ground Pressure:

56 kPa (600 mm (23.62 in) grouser shoe)
49 kPa (700 mm (27.56 in) grouser shoe)
43 kPa (800 mm (31.50 in) grouser shoe)

Complete Machine Dimensions

Dimensions vary based on arm (dipper) length:

Arm (dipper)	2650 mm (104.33 in)	3180 mm (125.20 in)	3600 mm (141.73 in)
Length (without attachment)	5590 mm (220.08 in)	5590 mm (220.08 in)	5590 mm (220.08 in)
Length (with attachment)	10480 mm (412.6 in)	10450 mm (411.4 in)	10470 mm (412.2 in)
Height (with attachment)	3340 mm (131.5 in)	3260 mm (128.35 in)	3460 mm (136.22 in)

Main Body Dimensions

Main body width: See machine overall dimensions Upper side swing body width: 2870 mm (112.99 in) Cab width: 1000 mm (39.37 in) Main body height: 3110 mm (122.44 in) Engine displacement: 3160 mm (124.41 in) Swing body tail distance: 3150 mm (124.01 in) Swing body rear section bottom height: 1190 mm (46.85 in) Distance between tumblers: 3980 mm (156.69 in) Overall track length: 4850 mm (190.94 in) Width of track shoe: 800 mm (31.50 in) (Optional: 600 mm (23.62 in) 700 mm (27.56 in)) Minimum ground clearance: 470 mm (18.50 in) (To bottom of lower frame)

Engine

Name: ISUZU, 6HK1X Type: 4-cycle, water-cooled, overhead camshaft, vertical in-line, direct injection type (electronic control), with turbocharger. No. of cylinders - bore x stroke: 6 - Ø115 mm x 125 mm (4.53 x 4.92 in) Displacement: 7.79 L (2.06 gal) Compression ratio: 17.5 Rated output: 154 kW / 1800 min⁻¹ Maximum torque: 850 N.m (626.93 lb-ft) / 1500 min⁻¹ Engine dimensions (LxWxH): 1357x995.4x1141 mm (53.42 x39.19x44.92 in) Oil pan: All direction 35 rad, inclinable Oil pan capacity: Maximum: 38 L (10.04 gal) Minimum: 28 L (7.40 gal) (excluding oil filter) Direction of rotation: Right (as seen from fan) Starter, reduction type: 24 V, 5 kW Alternator, AC type: 24 V, 50 A Battery: 2 x 12V, 128 Ah/5 Hr

Cooling System

Fan type: Ø 850 mm (33.46 in), suction type - 6 blades, plastic with belt mouth-type fan guide Pulley ratio: 0.80 (reduction) Radiator:

Fin type: wavy
Fin pitch: 2.0 mm (0.078 in) Oil cooler:
Fin type: wavy
Fin pitch: 1.75 mm (0.069 in) Inter-cooler:
Fin type: triangular straight
Fin pitch: 2.0 mm (0.078 in) Fuel cooler:
Fin type: wavy
Fin pitch: 2.0 mm (0.078 in) Coolant capacity: 14.5 L (3.83 gal) (engine only)

Capacity of Coolant and Lubricants

Coolant: 29 L (7.66 gal) Fuel: 450 L (118.88 gal) Lubricant for engine: 38 L (10.04 gal) Lubricant for travel reduction gear (per side): 9.1 L (2.40 gal) Lubricant for swing reduction gear (per side): 6 L (1.58 gal) Hydraulic oil: 300 L (79.25 gal) Capacity of hydraulic oil tank: 147 L (38.43 gal)

Hydraulic Oil Filter

Suction filter (inside tank): 150 mesh Return filter (inside tank): 6 µm Pilot line filter (inside housing): 8 µm

Fuel Filter

Main filter: 4 µm Pre-filter: 8 µm

Operating Devices

Operator's seat:

Location: left side
Structure: Adjustable forward and back, up and down, reclining mechanism, with seat suspension. Cab:
Sealed steel type, all reinforced glass. Levers and pedals:
For travel: Lever and pedal type (hydraulic pilot type) (x2)
For operating machine: Lever type (hydraulic pilot type) (x2) Instruments and switches:
Work mode select switch: 3 modes (SP / super power, H / heavy duty, A / automatic)
Travel mode select switch: Low-speed / high-speed switch type
One-touch idle: Knob switch type
Engine emergency stop: Switch type Monitor device:
Machine status display (full-dot liquid crystal)
Work mode selection status: SP / H / A
Instruments (full-dot liquid crystal, except for hour meter): Fuel gauge, Engine coolant temperature gauge, Hydraulic oil temperature gauge (all bar graph indicators), Hour meter (digital type).
Machine Status and Warning Alarms (full-dot liquid crystal and warning tone) for: Over heat, Battery charge, Refill fuel, Engine oil pressure, Refill coolant, Engine preheat, Auto warm-up, Air cleaner clogged, Anti-theft device triggered, Faulty engine system, Engine emergency stop. Lighting:
Working light: Tank (24V, 70W x1), Boom (24V, 70W x1), Cab (24V, 70W x2)
Interior light: 24V, 10W x1 Horn: Electric horn (x2) Other: Wiper with intermittent function, Window washer, Air conditioner, Rear view mirrors (left and right), Clock.

Hydraulic System

Hydraulic pump drive system: Directly coupled to the engine (no transmission). Main pump:

Manufacturer: Kawasaki
Pump type: Double variable displacement piston pump
Displacement volume: 136.7 cm³ (8.34 cu in) x 2 /rev
Rated operating pressure: 34.3 MPa (4975 psi)
Maximum operating pressure: 37.3 MPa (5410 psi)
Input revolution speed: 1800 min⁻¹
Maximum discharge flow: 246 L/min (64.99 gpm) x 2 / 243 L/min (64.19 gpm) x 2 at 1800 min⁻¹ Pilot pump:
Pump type: Gear pump
Displacement volume: 15 cm³ (0.91 cu in)/rev
Operating pressure: 3.92 MPa (568 psi)
Maximum flow: 27 L/min (7.13 gpm) (at 1800 min⁻¹)
Input horsepower: 2.8 kW Control method:
Hydraulic simultaneous constant output control.
Maximum flow adjustment control through external commands (negative control).
Setting horsepower adjustment control through external command current. Control Valve:
Model: 4-spool section: integrated (1) or 5-spool section: integrated (1)
Operation method: Hydraulic pilot method: travel, swing and operating machine
Maximum flow: 243 L/min (64.19 gpm)
Main relief set pressure: Standard; 34.3 MPa (4975 psi), power boost 37.3 MPa (5410 psi)
Overload set pressure: When boom down; 29.4 ± 0.5 MPa (4264 ± 72.5 psi), other: 39.2 MPa (5685 psi)
Foot relief set pressure: 2.55 MPa (369.85 psi) Functions: Straight travel circuit, Boom up / arm 2 pumps internal flow, Boom and arm load holding circuit, Boom-down regenerative circuit, Bucket-close regenerative circuit, Arm-in forced regenerative circuit, Swing priority variable orifice (for arm operation), 2 pumps flow, Variable foot relief.

Hydraulic Cylinders

Boom cylinder (x2):

Cylinder bore: Ø140 mm (Ø5.51 in)
Rod diameter: Ø95 mm (Ø3.74 in)
Maximum retracted length: 1918 mm (75.51 in)
Stroke: 1369 mm (53.90 in) Arm (dipper) cylinder:
Cylinder bore: Ø150 mm (Ø5.90 in)
Rod diameter: Ø105 mm (Ø4.13 in)
Maximum retracted length: 2205 mm (86.81 in)
Stroke: 1569 mm (61.77 in) Bucket cylinder:
Cylinder bore: Ø135 mm (Ø5.31 in)
Rod diameter: Ø90 mm (Ø3.54 in)
Maximum retracted length: 1692 mm (66.61 in)
Stroke: 1078 mm (42.44 in)

Rotating Joint

Operating pressure:

High pressure passage (ABCD): 34.3 MPa (4975 psi)
Drain port (E): 1.0 MPa (145 psi)
Pilot port (F): 3.9 MPa (566 psi) Flow:
High pressure passage (ABCD): 360 L/min (95.10 gpm)
Drain port (E): 40 L/min (10.57 gpm)
Pilot port (F): 31 L/min (8.19 gpm) Torque, when pressurizing 2 ports: 196 Nm (145 lb-ft) Port size: A, B, C, D ports are G1; E port is G1/2; F port is G1/4.

Solenoid Valve

Maximum flow: P -> B: 25 L/min (6.60 gpm), Other: 5 L/min (1.32 gpm) Rated pressure: 4.5 MPa (652.67 psi) Port size: P, T, B port are G3/8; C1, C2, C3, C4, C5 port are G1/4. Solenoid specifications:

Operating voltage: DC 20 to 32 V
Power consumption: 17 W max.

Hand Control Valve

Manufacturer: Kawasaki Operating pressure: 3.92 MPa (569 psi) Secondary pressure, primary short type: 0.64 to 2.45 MPa (92.82 to 355.34 psi) Operating angle: Ports 1, 3: 19°; Ports 2, 4: 25°. Graphs illustrate secondary pressure versus push rod stroke and operating angle for both Port 1,3 and Port 2,4.

Upperstructure

This section covers removal and installation procedures for major upperstructure components, including the counterweight, boom, dipper, bucket, seat, cab, and air conditioning system. It also lists large-size hydraulic and electrical schematics.

Dimensions and Wear Limits of Attachment Mobile Joints

Detailed specifications for the dimensions and wear limits of various attachment mobile joints are provided, including:

Boom foot/Frame
Boom cylinder foot/Frame
Boom cylinder head/Boom
Arm cylinder foot/Boom
Boom/Arm
Arm cylinder head/Arm
Bucket cylinder foot/Arm
Connecting rod/Arm
Compensator/Bucket
Connecting rod/Compensator/Bucket cylinder head
Arm/Bucket

Machine Overall Dimensions

This section provides a comprehensive overview of the machine's overall dimensions.

Case CX290B - Page 11

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