Caterpillarwork toolshear-demolition/scrap
Caterpillar S325B
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar S325B is a mobile scrap and demolition shear attachment designed for mid-sized excavators. It weighs 2996 kg (6604 lb) in stick mount configuration and 3390 kg (7474 lb) in boom mount configuration. The unit features a 1525 mm (60 in) height, 3177 mm (125 in) length, and 792 mm (31 in) width. It delivers a tip force of 1274 kN (143 sh ton) and a throat force of 5562 kN (625 sh ton). The S325B requires a maximum rotation circuit flow of 40 L/min (10.6 gpm) and a cutting circuit flow of 200 L/min (53 gpm). It is classified as a non-current product within the Caterpillar attachments portfolio.
The S325B succeeded earlier shear models in the Caterpillar mobile scrap line, introducing a unique straight lower jaw design to enhance cutting force and fully reversible knives with four effective cutting edges. Its significance in the used market lies in its integration with mid-sized Cat excavators, offering versatile production for primary steel-frame demolition and scrap processing. The attachment’s protected cylinder design and large access panels facilitate serviceability, while its 360-degree jaw rotation allows rapid positioning for cuts. As a non-current model, it remains a critical component for operators maintaining legacy fleets requiring high-apex force capabilities.
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 S325B specifications
Engine
| Model | Cat C4.4 |
| Gross Power | 177 hp (132 kW) |
| Emissions Tier | Tier 4 Final / EU Stage V |
Weights
| Operating Weight (325B) | 25,508 kg (56,240 lb) |
| Operating Weight (325B-L) | 27,488 kg (60,600 lb) |
| Operating Weight (325BL) | 27,488 kg (60,600 lb) |
Dimensions
| Transport Length (325B) | 33 ft 9 in (0.23 m) |
| Transport Width (325B) | 10 ft 6 in (0.15 m) |
| Transport Height (325B) | 10 ft 9 in (0.23 m) |
| Transport Length (325BL) | 33 ft 8 in (0.2 m) |
| Transport Width (325BL) | 11 ft 1 in (0.03 m) |
| Transport Height (325BL) | 10 ft 7 in (0.18 m) |
Performance
| Max Digging Depth (325B) | 23.3 ft (7.10 m) |
| Max Digging Depth (325B-L) | 19.7 ft (6.01 m) |
| Max Cutting Height (325B) | 32.7 ft (9.97 m) |
| Bucket Capacity | 1.4 to 2.5 cu yd (1.07 to 1.91 m³) |
Service capacities (summary)
| Fluid Recommendations | Cat DEO/DEO-ULS engine oil, Cat HYDO Advanced hydraulic oil, Cat TDTO transmission fluid, ELC coolant |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
Caterpillar S325B maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
Servicing the S325B beyond the schedule
Predictive Maintenance & Fluid Analysis
Monitor hydraulic oil condition via S.O.S analysis at 1000-hour intervals to detect pump and valve wear metals. Check coolant SCA levels at 500-hour intervals to prevent liner pitting. Inspect the cutting circuit relief pressure, set to 35000 kPa (5075 psi), and rotation circuit relief at 14000 kPa (2031 psi). Verify the straight lower jaw alignment to ensure even steel spreading and maximize shear cutting force. Track the 200 L/min (53 gpm) cutting flow to identify pump degradation before catastrophic failure.
Corrective & Common Repairs
Replace the four reversible main, side, and front knives when cutting edges wear to maintain the 528 mm (21 in) jaw opening. Inspect the protected cylinder housing for damage during the complete cutting cycle. Check the 342 mm (13 in) moving jaw width and 304 mm (12 in) fixed jaw width for excessive play. Address hydraulic hose abrasion near the rotation circuit connections. Ensure the 3-second close cycle time remains consistent to prevent hydraulic hammering and seal damage.
Overhaul & Rebuild Points
Evaluate the shear housing structure during the 2000-hour comprehensive structural inspection. Replace seals and gaskets during the hydraulic oil change to prevent cross-contamination. Inspect the swing mechanism and pivot points for wear that could affect the 360-degree jaw rotation. Check the 5562 kN (625 sh ton) throat force transmission components for fatigue cracks. Verify the integrity of the 1274 kN (143 sh ton) tip force application points on the jaw tips.
Seasonal & Environment Servicing
In dusty environments, inspect the air filter restriction indicator daily and clean radiator fins to prevent overheating. In cold climates, verify the hydraulic fluid viscosity and ensure the 40 L/min (10.6 gpm) rotation circuit flows freely. Check the 35000 kPa (5075 psi) cutting circuit pressure for cold-start performance. Inspect the 1525 mm (60 in) height clearance for ice buildup. Ensure the 3177 mm (125 in) length does not obstruct transport in confined winter sites.
S325B fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| CID 0110 FMI 03 | Engine Coolant Temperature Sensor — Voltage Above Normal | Open circuit in the sensor wiring harness or a failed sensor element causing a short to the power supply. | Inspect the sensor connector and wiring for damage; test sensor resistance and replace if out of specification. |
| CID 0190 FMI 08 | Engine Speed Sensor — Abnormal Frequency | Incorrect air gap between the speed sensor and the tone ring, or physical damage to the tone ring teeth. | Check the sensor mounting and air gap; inspect the tone ring for missing or damaged teeth. |
| CID 0041 FMI 03 | 8-Volt DC Supply — Voltage Above Normal | Short to power on the 8-volt reference circuit shared by multiple sensors. | Disconnect sensors on the 8V supply one by one to isolate the shorted component or wiring section. |
| CID 0041 FMI 04 | 8-Volt DC Supply — Voltage Below Normal | Short to ground on the 8-volt reference circuit. | Disconnect sensors on the 8V supply one by one to locate the component causing the ground fault. |
| CID 0168 FMI 02 | System Voltage — Erratic, Intermittent, or Incorrect | Loose battery connections, failing alternator, or poor grounding straps causing voltage fluctuations. | Check battery terminal tightness and corrosion; test alternator output and ground strap continuity. |
| CID 0248 FMI 09 | Cat Data Link — Abnormal Update Rate | Damaged CAN bus wiring, poor connection at the diagnostic connector, or termination resistor failure. | Inspect the diagnostic link connector for bent pins; measure CAN bus termination resistance. |
| CID 0262 FMI 04 | 5-Volt Supply — Voltage Below Normal | Short to ground on the 5-volt reference circuit used by electronic sensors. | Disconnect sensors on the 5V supply sequentially to identify the shorted sensor or wiring. |
| CID 0164 FMI 03 | Injector Actuation Pressure — Voltage Above Normal | Open circuit in the actuator pressure sensor signal line or sensor failure. | Check the sensor wiring harness for opens; verify sensor operation with a multimeter. |
| CID 0268 FMI 02 | Programmed Parameter Fault — Erratic, Intermittent, or Incorrect | ECM memory corruption or missing calibration data requiring a software update. | Connect CAT ET to check for active calibration faults; reprogram the ECM if parameters are missing. |
| CID 0091 FMI 02 | Throttle Position Sensor — Erratic, Intermittent, or Incorrect | Worn throttle body internals, loose connector, or intermittent signal loss. | Inspect the throttle body for carbon buildup or wear; check connector pins for tightness. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
All S325B assemblies by section
Every catalogued assembly group for the Caterpillar S325B. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Frame And Body
310-2108 Housing Gp-Shear
| 14***06 | Bolt-Socket Head; (M20x2.5x140-mm) | 5 |
| 20***25 | Valve Group-Speed Control | 1 |
| 22***13 | Cylinder & Lines Group-Shear | 1 |
325-6440 Housing Gp-Shear
| 14***16 | Connector Group | 2 |
| 14***51 | Elbow Group | 1 |
| 16***54 | Seal | 1 |
317-6006 Housing Gp-Shear
| 14***06 | Bolt-Socket Head; (M20x2.5x140-mm) | 5 |
| 20***25 | Valve Group-Speed Control | 1 |
| 24***97 | Cylinder & Lines Group-Shear | 1 |
318-6212 Housing Gp-Shear
| 14***16 | Connector Group | 2 |
| 14***51 | Elbow Group | 1 |
| 16***54 | Seal | 1 |
240-5915 Housing Gp-Shear
| 14***16 | Connector Group | 1 |
| 16***24 | Hose As | 1 |
| 17***64 | Hose As | 1 |
327-5370 Housing Gp-Shear
| 14***16 | Connector Group | 2 |
| 14***51 | Elbow Group | 1 |
| 16***54 | Seal | 1 |
226-0714 Housing Gp-Shear
| 14***16 | Connector Group | 1 |
| 18***03 | Hose As | 1 |
| 19***85 | Hose As | 1 |
Hydraulic System
318-0062 Cylinder & Lines Gp-Shear
| 14***16 | Connector Group | 1 |
| 18***15 | Hose As | 1 |
| 18***16 | Hose As | 1 |
240-5497 Cylinder & Lines Gp-Shear
| 14***06 | Bolt-Socket Head; (M20x2.5x140-mm) | 5 |
| 20***25 | Valve Group-Speed Control | 1 |
| 24***97 | Cylinder & Lines Group-Shear | 1 |
228-8613 Cylinder & Lines Gp-Shear
| 14***06 | Bolt-Socket Head; (M20x2.5x140-mm) | 5 |
| 20***25 | Valve Group-Speed Control | 1 |
| 22***13 | Cylinder & Lines Group-Shear | 1 |
321-3765 Cylinder & Lines Gp-Shear
| 09***48 | Nipple, Grease | 1 |
| 09***06 | Bolt-Socket Head; (M16x2x80-mm) | 24 |
| 16***71 | Bushing | 2 |
317-8054 Cylinder & Valve Gp
| 16***16 | Seal | 1 |
| 17***23 | Plug As | 4 |
| 17***23 | Bushing | 2 |
240-5496 Cylinder & Valve Gp
| 16***16 | Seal | 1 |
| 17***23 | Plug As | 4 |
| 17***23 | Bushing | 2 |
317-5991 Cylinder & Valve Gp
| 16***16 | Seal | 1 |
| 17***21 | Adapter As | 1 |
| 1P***05 | Seal (Check Valve Outlet) | 2 |
227-3768 Cylinder & Valve Gp
| 16***16 | Seal | 1 |
| 17***21 | Adapter As | 1 |
| 1P***05 | Seal (Check Valve Outlet) | 2 |
327-5371 Cylinder & Valve Gp
| 09***48 | Nipple, Grease | 1 |
| 16***87 | Bushing | 2 |
| 17***50 | Pin-Spring | 1 |
318-0061 Cylinder & Valve Gp
| 16***54 | Seal | 1 |
| 17***82 | Bolt-Socket Head; (M24x3x150-mm) | 29 |
| 20***98 | Lock | 1 |
321-2531 Cylinder & Valve Gp
| 09***48 | Nipple, Grease | 1 |
| 14***84 | Bolt-Socket Head; (M20x2.5x110-mm) | 22 |
| 16***55 | Bushing | 2 |
317-5993 Cylinder Gp-Hydraulic
| 14***45 | Connector As | 2 |
| 20***74 | Fitting Group-Hydraulic; (Quick Disconnect, Female) | 2 |
| 2M***80 | Seal--To Connector Pump Outlet | 1 |
327-5372 Cylinder Gp-Hydraulic
| 13***38 | Hose As. | 2 |
| 1P***04 | Seal - Rectangular (45mm Dia) | 2 |
| 1P***67 | Flange-Half (43.31 mm Id) | 4 |
317-5992 Cylinder Gp-Hydraulic
| 16***54 | Seal | 1 |
| 17***82 | Bolt-Socket Head; (M24x3x150-mm) | 29 |
| 20***98 | Lock | 1 |
321-2532 Cylinder Gp-Hydraulic
| 1P***04 | Seal - Rectangular (45mm Dia) | 2 |
| 1P***67 | Flange-Half (43.31 mm Id) | 4 |
| 21***27 | Hose As | 2 |
321-2534 Cylinder Gp-Hydraulic
| 1P***04 | Seal - Rectangular (45mm Dia) | 2 |
| 1P***67 | Flange-Half (43.31 mm Id) | 4 |
| 21***02 | Hose As | 2 |
317-6404 Cylinder Gp-Shear
| 25***45 | Hose As | 2 |
| 31***04 | Cylinder Group-Shear | 1 |
| 3K***60 | Seal Pilot Manifold On; Seal To Boom Check Valve Drain | 2 |
240-5484 Cylinder Gp-Shear
| 16***46 | Bar-Clamp | 2 |
| 16***90 | Clip; (Slot) | 2 |
| 16***91 | Clip; (Tab) | 2 |
317-6403 Cylinder Gp-Shear
| 1P***04 | Seal - Rectangular (45mm Dia) | 2 |
| 1P***67 | Flange-Half (43.31 mm Id) | 4 |
| 23***81 | Hose As | 2 |
327-5373 Cylinder Gp-Shear
| 09***70 | Bolt-Socket Hd; (M12 X 1.75 X 45) | 16 |
| 1P***04 | Seal - Rectangular (45mm Dia) | 4 |
| 1P***67 | Flange-Half (43.31 mm Id) | 8 |
227-4144 Cylinder Gp-Shear
| 10***16 | Hose As | 2 |
| 1P***04 | Seal - Rectangular (45mm Dia) | 4 |
| 1P***67 | Flange-Half (43.31 mm Id) | 4 |
270-7425 Fitting Gp-Hydraulic
| 1P***05 | Seal (Check Valve Outlet) | 4 |
| 20***08 | Hose As | 2 |
| 25***89 | Hose As | 1 |
221-0855 Lines Gp-Connecting
| 22***55 | Lines Group-Connecting | 1 |
| 27***24 | Lines Group-Connecting | 1 |
| 27***25 | Lines Group-Connecting | 1 |
258-9890 Lines Gp-Connecting
| 1P***04 | Seal - Rectangular (45mm Dia) | 1 |
| 1P***05 | Seal (Check Valve Outlet) | 3 |
| 1P***67 | Flange-Half (43.31 mm Id) | 2 |
302-8171 Lines Gp-Connecting
| 14***09 | Plug As-Sto | 2 |
| 17***42 | Rotor | 1 |
| 17***43 | Ring | 1 |
221-0856 Lines Gp-Connecting
| 21***73 | Hose As | 2 |
| 22***56 | Lines Group-Connecting | 1 |
| 5P***77 | Flange-Half | 4 |
270-4349 Lines Gp-Connecting
| 09***73 | Bolt; (Socket Head) (M12x1.75x60mm) | 8 |
| 12***28 | Adaptor - Includes:- | 4 |
| 12***24 | Seal-O-Ring; (12.37mm Id) | 4 |
239-9251 Lines Gp-Connecting
| 14***68 | Hose As | 2 |
| 14***45 | Connector As | 2 |
| 23***51 | Lines Group-Connecting | 1 |
221-0857 Lines Gp-Connecting
| 14***45 | Connector As | 2 |
| 22***57 | Lines Group-Connecting | 1 |
| 24***08 | Hose As | 2 |
270-7586 Lines Gp-Connecting
| 08***72 | Seal-O-Ring | 1 |
| 14***28 | Connector Assem. | 2 |
| 14***35 | Connect Group; (Each Includes) | 4 |
341-2542 Lines Gp-Connecting
| 13***54 | Plug As | 3 |
| 20***87 | Slack Adjuster Group | 1 |
| 20***88 | Valve Group-Control | 1 |
270-4347 Lines Gp-Connecting
| 17***21 | Kit-Housing | 1 |
| 17***22 | Shaft-Output | 1 |
| 17***25 | Key-Square | 1 |
216-1733 Lines Gp-Connecting
| 14***68 | Hose As | 2 |
| 14***45 | Connector As | 2 |
| 21***33 | Lines Group-Connecting | 1 |
273-7602 Lines Gp-Connecting
| 08***72 | Seal-O-Ring | 1 |
| 14***28 | Connector Assem. | 2 |
| 14***35 | Connect Group; (Each Includes) | 4 |
270-3924 Lines Gp-Connecting
| 1P***04 | Seal - Rectangular (45mm Dia) | 2 |
| 1P***05 | Seal (Check Valve Outlet) | 2 |
| 27***24 | Lines Group-Connecting | 1 |
211-9059 Lines Gp-Connecting
| 14***59 | Hose As | 2 |
| 21***59 | Lines Group-Connecting | 1 |
| 5P***77 | Flange-Half | 4 |
270-4348 Lines Gp-Connecting
| 17***73 | Motor Group-Gerotor | 1 |
| 17***76 | Ring-Mounting | 1 |
| 17***77 | Gear-Drive; (15-Teeth) | 1 |
244-6796 Lines Gp-Connecting
| 1P***04 | Seal - Rectangular (45mm Dia) | 3 |
| 1P***05 | Seal (Check Valve Outlet) | 1 |
| 1P***67 | Flange-Half (43.31 mm Id) | 2 |
239-9250 Lines Gp-Connecting
| 23***50 | Lines Group-Connecting | 1 |
| 27***47 | Lines Group-Connecting | 1 |
| 27***48 | Lines Group-Connecting | 1 |
270-7585 Lines Gp-Connecting
| 09***73 | Bolt; (Socket Head) (M12x1.75x60mm) | 16 |
| 12***28 | Adaptor - Includes:- | 4 |
| 12***24 | Seal-O-Ring; (12.37mm Id) | 4 |
239-9252 Lines Gp-Connecting
| 23***52 | Lines Group-Connecting | 1 |
| 24***96 | Lines Group-Connecting | 1 |
| 27***85 | Lines Group-Connecting | 1 |
270-3926 Lines Gp-Connecting
| 14***20 | Bolt-Socket Head; (M6x1x75-mm) | 4 |
| 17***73 | Motor Group-Gerotor | 1 |
| 17***77 | Gear-Drive; (15-Teeth) | 1 |
273-9212 Lines Gp-Connecting
| 16***43 | Seal | 1 |
| 17***57 | Plug As | 4 |
| 17***14 | Stator | 1 |
270-3925 Lines Gp-Connecting
| 14***20 | Bolt-Socket Head; (M6x1x75-mm) | 4 |
| 27***25 | Lines Group-Connecting | 1 |
| 7Y***19 | Seal-O-Ring (Id=12.37mm) | 2 |
170-2174 Manifold Gp-Control
| 17***74 | Manifold Group-Control | 1 |
| 17***30 | Plug | 6 |
| 17***31 | Valve | 1 |
318-8396 Motor & Manifold Gp-Rotator
| 09***01 | Bolt-Socket Head; (M8x1.25x40-mm) | 4 |
| 17***55 | Seal-O-Ring | 2 |
| 20***74 | Bolt-Socket Head; (M16x2x55-mm) | 8 |
170-2173 Motor Gp-Gerotor
| 14***86 | Fitting As | 2 |
| 15***44 | Seal | 1 |
| 17***73 | Motor Group-Gerotor | 1 |
216-7650 Motor Gp-Gerotor
| 14***86 | Fitting As | 2 |
| 15***44 | Seal | 1 |
| 17***77 | Fitting As; (Quick Disconnect, Male) | 4 |
243-1695 Rotator Gp-Hydraulic
| 16***15 | Ring-Adjustment | 1 |
| 24***95 | Rotator Group-Hydraulic | 1 |
| 31***60 | Pipe | 1 |
323-8109 Rotator Gp-Hydraulic
| 19***01 | Adjusting Ring | 1 |
| 32***09 | Rotator Group-Hydraulic | 1 |
| 32***80 | Template | 1 |
266-7382 Rotator Gp-Hydraulic
| 20***41 | Washer; (21x63.5x22-mm Thk) | 2 |
| 24***85 | Ring | 1 |
| 24***86 | Wrench; (Lock, 140) | 1 |
314-9134 Rotator Gp-Hydraulic
| 20***41 | Washer; (21x63.5x22-mm Thk) | 2 |
| 24***86 | Wrench; (Lock, 140) | 1 |
| 24***76 | Wrench; (Lock, 160) | 1 |
318-8397 Swivel Gp
| 15***96 | Film-Notice; (Lift Eye Location) | 3 |
| 22***69 | Film-Warning; (Do Not Operate, Read Omm) | 2 |
| 24***58 | Film-Identification; (Cat S365b) | 2 |
265-6468 Swivel Gp
| 16***93 | Ring-Adjustment | 1 |
| 26***68 | Swivel Group | 1 |
| 31***60 | Pipe | 1 |
208-8451 Valve Gp-Control
| 15***96 | Film-Notice; (Lift Eye Location) | 3 |
| 20***51 | Valve Group-Control | 1 |
| 22***69 | Film-Warning; (Do Not Operate, Read Omm) | 2 |
170-3229 Valve Gp-Speed Control
| 13***55 | Setscrew; (M4x0.7x8-mm) | 2 |
| 17***29 | Valve Group-Speed Control | 1 |
| 23***60 | Film-Notice; (Lift Eye Location) | 4 |
208-5125 Valve Gp-Speed Control
| 13***55 | Setscrew; (M4x0.7x8-mm) | 2 |
| 20***25 | Valve Group-Speed Control | 1 |
| 23***60 | Film-Notice; (Lift Eye Location) | 4 |
Service Equipment And Supplies
226-0718 Kit-Maintenance
| 13***55 | Setscrew; (M4x0.7x8-mm) | 2 |
| 22***18 | Kit-Maintenance | 1 |
| 23***60 | Film-Notice; (Lift Eye Location) | 4 |
327-5368 Kit-Maintenance
| 32***68 | Kit-Maintenance | 1 |
317-8059 Kit-Maintenance
| 31***59 | Kit-Maintenance | 1 |
325-6438 Kit-Maintenance
| 32***38 | Kit-Maintenance | 1 |
327-8983 Kit-Maintenance
| 32***83 | Kit-Maintenance | 1 |
327-8979 Kit-Maintenance
| 32***79 | Kit-Maintenance | 1 |
240-5914 Kit-Maintenance
| 24***14 | Kit-Maintenance | 1 |
200-2962 Lock Gp-Shear
| 20***62 | Lock Group-Shear | 1 |
327-8987 Plate & Film Gp
| 32***87 | Plate & Film Group | 1 |
327-8989 Plate & Film Gp
327-8988 Plate & Film Gp
| 32***88 | Plate & Film Group | 1 |
226-0717 Plate & Film Gp
| 22***17 | Plate & Film Group | 1 |
240-5913 Plate & Film Gp
| 24***13 | Plate & Film Group | 1 |
Work Tool Arrangement
317-5990 Shear Ar-Hydraulic
| 31***08 | Housing Group-Shear, Flexible Hose | 1 |
| 31***34 | Rotator Group-Hydraulic | 1 |
| 31***90 | Shear Ar-Hydraulic | 1 |
226-0716 Shear Ar-Hydraulic
| 22***13 | Shear Group-Hydraulic | 1 |
| 22***16 | Shear Ar-Hydraulic | 1 |
| 22***18 | Kit-Maintenance | 1 |
318-6201 Shear Ar-Hydraulic
| 31***01 | Shear Ar-Hydraulic | 1 |
| 31***11 | Shear Group-Hydraulic | 1 |
| 32***83 | Kit-Maintenance | 1 |
240-5911 Shear Ar-Hydraulic
| 24***11 | Shear Ar-Hydraulic | 1 |
| 24***12 | Shear Group-Hydraulic | 1 |
| 24***13 | Plate & Film Group | 1 |
318-7240 Shear Ar-Hydraulic
| 31***27 | Shear Group-Hydraulic | 1 |
| 31***40 | Shear Ar-Hydraulic | 1 |
| 32***79 | Kit-Maintenance | 1 |
317-5989 Shear Ar-Hydraulic
| 31***89 | Shear Ar-Hydraulic | 1 |
| 31***90 | Shear Ar-Hydraulic | 1 |
| 31***59 | Kit-Maintenance | 1 |
Work Tools
344-2681 Bracket Gp-Mounting
| 34***81 | Bracket Group-Mounting | 1 |
| 8T***32 | Nut (M16 X 2 Thd); (M16x2.00 Thd) | 2 |
| 8T***75 | Bolt; (M16x2x90-mm) | 1 |
254-5861 Bracket Gp-Mounting
| 16***82 | Bolt-Socket Head; (M24x3x70-mm) | 14 |
| 25***61 | Bracket Group-Mounting | 1 |
| 25***09 | Bracket Group-Mounting | 1 |
233-4675 Bracket Gp-Mounting
| 13***55 | Setscrew; (M4x0.7x8-mm) | 2 |
| 17***90 | Bolt-Socket Head; (M20x2.5x70-mm) | 36 |
| 20***59 | Plate-Serial Number | 1 |
199-1259 Bracket Gp-Mounting
| 15***21 | Lockwasher | 2 |
| 16***82 | Bolt-Socket Head; (M24x3x70-mm) | 10 |
| 19***59 | Bracket Group-Mounting | 1 |
270-1912 Bracket Gp-Mounting
| 16***82 | Bolt-Socket Head; (M24x3x70-mm) | 42 |
| 27***12 | Bracket Group-Mounting | 1 |
| 27***79 | Bracket Group-Mounting | 1 |
222-8506 Bracket Gp-Mounting
| 17***90 | Bolt-Socket Head; (M20x2.5x70-mm) | 36 |
| 22***06 | Bracket Group-Mounting | 1 |
| 22***13 | Bracket Group-Mounting | 1 |
257-1041 Bracket Gp-Mounting
| 15***28 | Bearing-Sleeve | 2 |
| 15***19 | Lockwasher | 16 |
| 17***61 | Cover | 2 |
257-1047 Bracket Gp-Mounting
| 16***82 | Bolt-Socket Head; (M24x3x70-mm) | 46 |
| 25***47 | Bracket Group-Mounting | 1 |
| 25***09 | Bracket Group-Mounting | 1 |
222-8513 Bracket Gp-Mounting
| 09***54 | Seal; (Id=79.85mm) | 2 |
| 13***59 | Bearing-Sleeve | 2 |
| 15***19 | Lockwasher | 16 |
257-4110 Bracket Gp-Mounting
| 15***18 | Lockwasher | 8 |
| 19***96 | Cover | 1 |
| 25***10 | Bracket Group-Mounting | 1 |
220-9951 Bracket Gp-Mounting
| 16***82 | Bolt-Socket Head; (M24x3x70-mm) | 14 |
| 22***51 | Bracket Group-Mounting | 1 |
| 22***12 | Bracket Group-Mounting | 1 |
282-2864 Bracket Gp-Mounting
| 22***63 | Shim; (1-mm Thk) | 4 |
| 22***64 | Shim; (1.5-mm Thk) | 4 |
| 22***67 | Edge-Cutting | 2 |
189-0311 Bracket Gp-Mounting
| 15***19 | Lockwasher | 16 |
| 17***61 | Cover | 2 |
| 18***11 | Bracket Group-Mounting | 1 |
257-0102 Bracket Gp-Mounting
| 15***18 | Lockwasher | 6 |
| 17***33 | Cover | 1 |
| 25***02 | Bracket Group-Mounting | 1 |
272-4879 Bracket Gp-Mounting
| 16***82 | Bolt-Socket Head; (M24x3x70-mm) | 16 |
| 27***79 | Bracket Group-Mounting | 1 |
| 31***50 | Bracket Group-Mounting | 1 |
222-8511 Bracket Gp-Mounting
| 14***90 | Bearing-Sleeve; (140.26mm Od) | 2 |
| 15***19 | Lockwasher | 16 |
| 17***61 | Cover | 2 |
222-8512 Bracket Gp-Mounting
| 16***82 | Bolt-Socket Head; (M24x3x70-mm) | 14 |
| 22***12 | Bracket Group-Mounting | 1 |
| 23***76 | Bracket Group-Mounting | 1 |
257-0099 Bracket Gp-Mounting
| 15***18 | Lockwasher | 6 |
| 17***33 | Cover | 1 |
| 25***99 | Bracket Group-Mounting | 1 |
254-5862 Bracket Gp-Mounting
| 14***33 | Boss-Tapped; (Tapped) | 1 |
| 15***19 | Lockwasher | 16 |
| 18***74 | Cover | 2 |
318-8149 Bracket Gp-Mounting
| 15***21 | Lockwasher | 3 |
| 23***74 | Bushing | 10 |
| 25***68 | Plate-Wear | 1 |
247-0536 Bracket Gp-Mounting
| 09***49 | Washer; (22x60x6-mm Thk) | 1 |
| 16***82 | Bolt-Socket Head; (M24x3x70-mm) | 14 |
| 20***71 | Washer; (26x90x8-mm Thk) | 1 |
257-0101 Bracket Gp-Mounting
| 17***90 | Bolt-Socket Head; (M20x2.5x70-mm) | 36 |
| 25***01 | Bracket Group-Mounting | 1 |
| 25***47 | Bracket Group-Mounting | 1 |
254-4463 Bracket Gp-Mounting
| 14***90 | Bearing-Sleeve; (140.26mm Od) | 2 |
| 15***18 | Lockwasher | 16 |
| 17***61 | Cover | 2 |
199-1258 Bracket Gp-Mounting
| 13***55 | Setscrew; (M4x0.7x8-mm) | 2 |
| 16***82 | Bolt-Socket Head; (M24x3x70-mm) | 14 |
| 19***58 | Bracket Group-Mounting | 1 |
222-8508 Bracket Gp-Mounting
| 15***19 | Lockwasher | 16 |
| 18***74 | Cover | 2 |
| 22***08 | Bracket Group-Mounting | 1 |
256-3109 Bracket Gp-Mounting
| 15***18 | Lockwasher | 6 |
| 17***33 | Cover | 1 |
| 25***09 | Bracket Group-Mounting | 1 |
190-5435 Bracket Gp-Mounting
| 13***17 | Bearing-Sleeve; (116.23mm Od) | 2 |
| 15***19 | Lockwasher | 16 |
| 17***61 | Cover | 2 |
282-0532 Bracket Gp-Mounting
| 13***17 | Bearing-Sleeve; (116.23mm Od) | 2 |
| 15***19 | Lockwasher | 16 |
| 18***74 | Cover | 2 |
253-7830 Bracket Gp-Mounting
| 16***82 | Bolt-Socket Head; (M24x3x70-mm) | 46 |
| 25***30 | Bracket Group-Mounting | 1 |
| 25***62 | Bracket Group-Mounting | 1 |
282-2863 Bracket Gp-Mounting
| 22***62 | Shim; (1-mm Thk) | 4 |
| 22***63 | Shim; (1-mm Thk) | 4 |
| 22***64 | Shim; (1.5-mm Thk) | 4 |
269-7527 Bracket Gp-Mounting
| 15***18 | Lockwasher | 8 |
| 19***96 | Cover | 1 |
| 26***27 | Bracket Group-Mounting | 1 |
270-1913 Bracket Gp-Mounting
| 15***18 | Lockwasher | 8 |
| 19***96 | Cover | 1 |
| 27***13 | Bracket Group-Mounting | 1 |
257-4109 Bracket Gp-Mounting
| 16***82 | Bolt-Socket Head; (M24x3x70-mm) | 44 |
| 25***09 | Bracket Group-Mounting | 1 |
| 26***27 | Bracket Group-Mounting | 1 |
271-0111 Bracket Gp-Mounting
| 10***96 | Bearing-Sleeve | 2 |
| 13***55 | Setscrew; (M4x0.7x8-mm) | 2 |
| 15***19 | Lockwasher | 16 |
180-1286 Bracket Gp-Mounting
| 17***90 | Bolt-Socket Head; (M20x2.5x70-mm) | 36 |
| 18***86 | Bracket Group-Mounting | 1 |
| 19***94 | Bracket Group-Mounting | 1 |
179-1648 Bracket Gp-Mounting
| 15***18 | Lockwasher | 6 |
| 17***46 | Bracket As | 1 |
| 17***33 | Cover | 1 |
169-4968 Bracket Gp-Mounting
| 16***68 | Bracket Group-Mounting | 1 |
| 16***82 | Bolt-Socket Head; (M24x3x70-mm) | 14 |
| 23***05 | Bracket As | 1 |
246-9991 Bracket Gp-Mounting
| 09***49 | Washer; (22x60x6-mm Thk) | 2 |
| 13***55 | Setscrew; (M4x0.7x8-mm) | 2 |
| 16***82 | Bolt-Socket Head; (M24x3x70-mm) | 14 |
222-8507 Bracket Gp-Mounting
| 13***17 | Bearing-Sleeve; (116.23mm Od) | 2 |
| 15***19 | Lockwasher | 16 |
| 18***74 | Cover | 2 |
175-0339 Bracket Gp-Mounting
| 17***90 | Bolt-Socket Head; (M20x2.5x70-mm) | 36 |
| 17***39 | Bracket Group-Mounting | 1 |
| 17***48 | Bracket Group-Mounting | 1 |
209-1776 Bracket Gp-Mounting
| 16***82 | Bolt-Socket Head; (M24x3x70-mm) | 16 |
| 20***76 | Bracket Group-Mounting | 1 |
| 22***11 | Bracket Group-Mounting | 1 |
318-8150 Bracket Gp-Mounting
| 14***78 | Lockwasher | 3 |
| 17***93 | Bolt-Socket Head; (M20x2.5x80-mm) | 3 |
| 22***49 | Plate-Wear | 1 |
347-1016 Bracket Gp-Mounting
| 24***15 | Housing Group-Shear | 1 |
| 24***95 | Rotator Group-Hydraulic | 1 |
| 34***16 | Bracket Group-Mounting | 1 |
257-0098 Bracket Gp-Mounting
| 17***90 | Bolt-Socket Head; (M20x2.5x70-mm) | 36 |
| 25***98 | Bracket Group-Mounting | 1 |
| 25***02 | Bracket Group-Mounting | 1 |
269-7525 Bracket Gp-Mounting
| 16***82 | Bolt-Socket Head; (M24x3x70-mm) | 44 |
| 26***25 | Bracket Group-Mounting | 1 |
| 27***13 | Bracket Group-Mounting | 1 |
363-7700 Bracket Gp-Mounting
| 31***34 | Rotator Group-Hydraulic | 1 |
| 31***12 | Housing Group-Shear | 1 |
| 36***00 | Bracket Group-Mounting | 1 |
256-3108 Bracket Gp-Mounting
| 17***90 | Bolt-Socket Head; (M20x2.5x70-mm) | 36 |
| 25***08 | Bracket Group-Mounting | 1 |
| 25***99 | Bracket Group-Mounting | 1 |
193-9094 Bracket Gp-Mounting
| 17***90 | Bolt-Socket Head; (M20x2.5x70-mm) | 36 |
| 19***94 | Bracket Group-Mounting | 1 |
| 19***58 | Bracket Group-Mounting | 1 |
233-4676 Bracket Gp-Mounting
| 15***18 | Lockwasher | 6 |
| 17***33 | Cover | 1 |
| 23***76 | Bracket Group-Mounting | 1 |
362-8489 Bracket Gp-Mounting
| 31***06 | Housing Group-Shear | 1 |
| 32***09 | Rotator Group-Hydraulic | 1 |
| 36***89 | Bracket Group-Mounting | 1 |
317-8040 Edge Gp-Cutting
| 09***05 | Bolt-Socket Head; (M16x2x100-mm) | 8 |
| 15***19 | Lockwasher | 2 |
| 15***21 | Lockwasher | 28 |
322-1929 Edge Gp-Cutting
| 15***19 | Lockwasher | 2 |
| 15***21 | Lockwasher | 4 |
| 16***41 | Bushing | 2 |
227-3769 Edge Gp-Cutting
| 22***69 | Edge Group-Cutting | 1 |
| 26***82 | Rotator Group-Hydraulic | 1 |
| 32***40 | Housing Group-Shear | 1 |
315-0192 Edge Gp-Cutting
| 15***19 | Lockwasher | 2 |
| 15***21 | Lockwasher | 30 |
| 16***12 | Clip; (Slot) | 2 |
240-6810 Edge Gp-Cutting
| 24***10 | Edge Group-Cutting | 1 |
| 24***95 | Rotator Group-Hydraulic | 1 |
| 32***70 | Housing Group-Shear | 1 |
347-0502 Mounting Gp-Work Tool
| 22***14 | Housing Group-Shear | 1 |
| 26***82 | Rotator Group-Hydraulic | 1 |
| 34***02 | Mounting Group-Work Tool | 1 |
344-1058 Mounting Gp-Work Tool
| 15***21 | Lockwasher | 3 |
| 23***74 | Bushing | 10 |
| 25***69 | Plate-Wear | 1 |
327-5369 Shear Gp-Hydraulic
| 16***16 | Seal | 1 |
| 17***21 | Adapter As | 1 |
| 1P***05 | Seal (Check Valve Outlet) | 2 |
318-6211 Shear Gp-Hydraulic
| 09***05 | Bolt-Socket Head; (M16x2x100-mm) | 8 |
| 15***21 | Lockwasher | 12 |
| 16***12 | Clip; (Slot) | 2 |
226-0713 Shear Gp-Hydraulic
| 15***19 | Lockwasher | 2 |
| 15***21 | Lockwasher | 2 |
| 17***15 | Bushing | 2 |
240-5912 Shear Gp-Hydraulic
| 10***40 | Plug | 1 |
| 15***19 | Lockwasher | 2 |
| 15***21 | Lockwasher | 4 |
317-8027 Shear Gp-Hydraulic
| 15***19 | Lockwasher | 2 |
| 15***21 | Lockwasher | 14 |
| 16***12 | Clip; (Slot) | 2 |
325-6439 Shear Gp-Hydraulic
| 16***16 | Seal | 1 |
| 17***21 | Adapter As | 1 |
| 1P***05 | Seal (Check Valve Outlet) | 2 |
Frequently asked questions
What engine does the S325B use?
The S325B is a hydraulic attachment and does not have an engine. It relies on the host excavator's hydraulic system, requiring a maximum cutting circuit flow of 200 L/min (53 gpm) and a rotation circuit flow of 40 L/min (10.6 gpm).
What is the operating weight of the S325B?
The S325B weighs 2996 kg (6604 lb) in stick mount configuration and 3390 kg (7474 lb) in boom mount configuration.
What replaced the S325B?
The S325B is listed as a non-current product in the Caterpillar attachments portfolio. Specific successor model designations are not documented in the available technical data.
What S325B owners discuss
What is the S325B classified as and what is its primary application?
The S325B is a mobile scrap and demolition shear attachment designed for primary steel-frame demolition and scrap processing, sized to fit mid-sized Cat excavators for versatile production work.
What are the key hydraulic flow and pressure specifications for the cutting and rotation circuits?
The cutting circuit requires a maximum flow of 200 L/min (53 gpm) with a maximum relief pressure of 35000 kPa (5075 psi). The rotation circuit requires a maximum flow of 40 L/min (10.6 gpm) with a maximum relief pressure of 14000 kPa (2031 psi).
What are the physical dimensions and weight options for the S325B?
The shear is 3177 mm (125 in) long, 792 mm (31 in) wide, and 1525 mm (60 in) high. The jaw opening is 528 mm (21 in) and the jaw depth is 571 mm (22 in). Weight is 2996 kg (6604 lb) for stick mount and 3390 kg (7474 lb) for boom mount.
What are the cutting force ratings for the S325B?
The tip force is 143 Sh Ton (1274 kN), the apex force is 250 Sh Ton (2221 kN), and the throat force is 625 Sh Ton (5562 kN).
What maintenance features are highlighted for the S325B shear?
The unit features large access panels on the top, bottom, and sides for internal servicing. The four main, side, and front knives are fully reversible, providing four effective cutting edges. The cylinder is fully protected by the shear housing design throughout the cutting cycle.
What is the cycle time for closing the jaws?
The cycle time to close the jaws is 3 seconds.
What should be checked when buying a used S325B shear?
Verify the condition of the reversible knives for wear, as they are the primary wear item. Check the hydraulic hoses and fittings for leaks, especially at the high-pressure cutting circuit connections. Inspect the cylinder for scoring or damage, ensuring the protective housing is intact. Confirm the 360-degree rotation mechanism operates smoothly without binding. Have your dealer verify the hydraulic flow and pressure requirements match your excavator's auxiliary circuit capabilities.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Need a specific S325B part?
Search live OEM part data, check fitment, and cross-reference alternatives with Heavy Parts AI.