Caterpillar S30
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar S30 is a mobile scrap and demolition shear, a passive hydraulic work tool mounted on an excavator boom and stick rather than a self-powered machine. It carries no engine, no ECM, and no fault codes of its own; every function, from jaw closing force to blade cycle speed, is driven entirely by the host excavator's auxiliary hydraulic circuit. The S30 was offered in a straight (fixed) configuration and, as the S230, in a rotating configuration that lets the operator spin the jaw independently of the boom for positioning cuts. It sat in the middle of Caterpillar's legacy shear lineup alongside the S25/S225, S40/S240, S50/S250, S80/S280, and S130/S2130, a family scaled by cutting force and carrier weight class rather than by generation. Caterpillar has since retired this naming scheme in favor of the S2000 (straight) and S3000 (rotating) mobile shear series, which cover a comparable range of excavator classes with updated jaw geometry and materials.
Because the S25-S130 family predates Caterpillar's current work-tool documentation practices, no official Cat spec sheet for the S30 survives in general circulation online; what exists is mostly secondary-market listings, used parts inventories, and scanned operation and parts manuals. For a buyer or owner, that means confirming fit, pin sizes, and hydraulic flow/pressure requirements against the actual attachment and host excavator rather than a current catalog page. Wear parts (blades, pins, bushings, cylinder seal kits) remain the practical consumables to budget for, and sourcing them may mean working through used-equipment dealers or aftermarket suppliers rather than a current Cat parts lookup. Given its age, a used S30 is best evaluated on pin/bushing wear, blade condition, and cylinder integrity rather than assumed to match published new-unit performance figures.
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 S30 specifications
Engine
| Engine | Not applicable. The S30 is a passive hydraulic demolition/scrap shear work tool with no engine of its own. It mounts on a host excavator's boom or stick and runs entirely off the carrier machine's hydraulic system. |
| Power source | Host excavator hydraulics only. No onboard power unit, fuel system, or electronic engine controls. |
Weights
| Shear operating weight (straight head) | Approximately 4,500 kg (9,920 lb) reported for the straight S30 head. Figures vary by configuration and source; treat as approximate. |
| Shear operating weight (rotating S230 head) | Approximately 4,000 kg (8,820 lb) reported for the 200-series rotating counterpart (S230), which adds a rotator group to the same shear head. Not officially cross-confirmed against the base S30 figure; verify exact weight for your specific unit with a dealer. |
| Recommended host carrier weight class | Roughly 28 to 40 tonnes (31 to 44 tons) per shear-family sizing references for this size of unit. Not confirmed on an official Cat spec sheet for the S30 specifically; confirm compatibility with your dealer before mounting. |
Dimensions
| Overall length | Approximately 3.5 m (11 ft 6 in), reported for this size of shear head. |
| Jaw opening (open) | Approximately 550 mm (21.7 in), reported for the 200-series rotating counterpart; treat as a class-appropriate reference for the S30 head pending direct confirmation. |
| Blade/jaw length | Approximately 530 mm (20.9 in), reported alongside the jaw-opening figure above. |
| Overall width / height | Not documented in available public sources. Verify with the Cat shear operation and maintenance manual or your dealer. |
Performance
| Cutting force (tip/root) | Not documented in available public sources for the S30. No verified tonnes/kN figure found; do not assume parity with the current S2000/S3000 series. Verify with your dealer or the shear's operation and maintenance manual. |
| Cycle time | Not documented in available public sources. |
| Rotator / degree of rotation | The +200 rotating counterpart (S230) carries a rotator-cylinder mounting group for continuous head rotation; the base S30 is the fixed straight-head version with no rotator. Exact degree-of-rotation spec for the rotating variant is not consistently documented across available sources — verify with your dealer. |
Service capacities (summary)
| Hydraulic working pressure | Approximately 350 bar (5,075 psi), reported for the rotating counterpart's circuit. Not independently confirmed for the base S30; the tool has no reservoir of its own and draws entirely from the host excavator's hydraulic system, so actual working pressure is set by the carrier's auxiliary circuit and pressure-control valve/accumulator setup. |
| Hydraulic flow requirement | Approximately 120 to 180 L/min (32 to 48 US gpm), reported for this size of shear head. Confirm against your specific host excavator's auxiliary flow rating. |
| Hydraulic reservoir | None. The shear has no independent hydraulic tank; it operates off the host excavator's hydraulic supply through the boom/stick auxiliary circuit. |
| Grease points | Not documented with a specific interval or grease specification in available public sources. Shear jaw pivot pins and, on the rotating head, the rotator bearing typically require regular daily greasing per Cat shear service literature; consult the operation and maintenance manual for exact points and intervals. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
S30 fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Hydraulic system (shear cylinders, rotator, and pressure-control/accumulator circuit) | No independent reservoir — the S30 mobile scrap and demolition shear is a passive hydraulic work tool with no engine, pump, or tank of its own. Cylinders, rotator drive, and the pressure-control valve/accumulator circuit run entirely off the host excavator's hydraulic system and share that carrier's oil volume and cooling capacity. | Matches whatever Cat-spec hydraulic oil is already in the host excavator (Cat HYDO Advanced or equivalent biodegradable/multigrade hydraulic oil per the carrier's own OMM, viscosity graded by ambient climate). The shear itself carries no separate fluid spec — confirm compatibility and required flow/pressure ratings against the host machine's OMM before mounting. |
| Pin and bushing lubrication (shear jaw pivots, rotator mounting, cylinder mounting pins) | Grease-to-purge at each fitting per the service interval — not a fill-and-check capacity like a crankcase or tank. Points regrease more often in wet, abrasive, or continuous-duty demolition and scrap-handling work. | NLGI 2 extreme-pressure grease, lithium-complex or moly-fortified base — Cat's own work-tool line (Cat Advanced 3Moly Grease or Cat Prime Application Grease) is the factory recommendation for pin and bushing points on Cat shears and other excavator-mounted work tools. Moly-fortified grade is preferred at the shear jaw and rotator pins for extra load-carrying protection; standard NLGI 2 EP grease is acceptable at lighter-duty pivot points. No separate winter/summer viscosity split is published for the grease — service temperature range runs roughly -20 to 40 C (-4 to 104 F) for the standard formulation. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar S30 maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 8 h |
|
| Every 50 h |
|
| Every 250 h |
|
| Every 1,000 h |
|
Servicing the S30 beyond the schedule
Predictive Maintenance & Fluid Analysis
The S30 has no engine oil or coolant to sample, so predictive care runs through the host excavator instead. Pull periodic samples from the carrier's auxiliary hydraulic circuit and watch for metallic particulate, a leading indicator of rotator gear or cylinder wear inside the shear itself. Track blade edge condition and cycle force over time; a shear that needs noticeably more pressure to close on the same material signals developing pin, bushing, or seal wear before it becomes a failure.
Corrective & Common Repairs
Routine corrective work on the S30 centers on the cutting edges: blades and wear plates get resharpened or swapped once rounding slows cutting performance. Pin and bushing replacement at the jaw and main pivot is the next most common repair, done once measured clearance exceeds allowable limits and play shows up as jaw misalignment. Cylinder seal kit replacement addresses rod weeping or loss of clamping force, and loose or sheared jaw bolts get retorqued or replaced as part of the same service visit.
Overhaul & Rebuild Points
A full S30 overhaul concentrates on three wear centers: the rotator drive and seal package on rotating S230 units, the main pivot pin and bushing set that carries jaw closing loads, and the cutting cylinder, which gets honed or re-chromed and fully resealed. Structural castings around the jaw and pivot bosses should be checked for stress cracking at rebuild time, since these high-load areas take the brunt of repeated shock loading from cutting and piercing scrap and structural steel.
Seasonal & Environment Servicing
Cold weather thickens grease at the pivot and rotator points, so switch to a winter-grade or low-temperature grease to keep pins properly lubricated in freezing conditions; in hot climates, more frequent greasing compensates for grease that runs thinner and migrates out faster. Scrap and demolition environments are hard on exposed metal, so keep cylinder rods wiped and protected from grit, and touch up paint on the jaw and frame to slow corrosion from moisture, mud, and cutting debris that accumulate in yard and site work.
S30 attachments & work tools
Model identity and family
The S30 is a hydraulic mobile scrap and demolition shear, not a self-propelled machine — it is itself a work tool that mounts to a hydraulic excavator. It belongs to Caterpillar's legacy shear lineup alongside the S25, S40, S50, S80 and S130 heads, documented together in a shared parts and operation/maintenance manual set.
Straight vs rotating configuration
The legacy line offers each size in two factory configurations: a fixed (non-rotating) head under the base number and a 360-degree continuous-rotation head under the same number plus 200 — so S30 is the fixed head and S230 is its rotating counterpart. This straight-vs-rotating split is the main factory configuration choice across the whole family, carried forward into Cat's later S2000 (straight) and S3000 (rotating) shear generations.
Carrier mounting arrangement
Mobile shears of this class attach to the excavator as a second member, pinned at the boom in place of the stick, or as a third member at the stick tip like a bucket or grapple, with an optional quick coupler for third-member use. Exact carrier size pairing for the specific S30 head is not documented in available literature — confirm boom/stick bracket geometry and carrier weight class against the unit's own parts manual or with a dealer.
Jaw and cutting-tip design
Cat's mobile shear jaws use a solid-plate upper jaw with a bolt-on piercing tip at the point of highest cutting stress, plus bolt-on knife/cutting segments along the lower jaw so worn edges can be replaced in the field without welding. This jaw architecture is documented for Cat's current-generation mobile shears; verify against the S30 unit's own parts book since detail design can differ across the shear line's history.
Hydraulic supply arrangement
The shear runs off the carrier's dedicated high-flow demolition circuit rather than the general auxiliary quick-coupler hydraulics used for buckets or grapples. Dual high-pressure ports let the head connect regardless of the carrier's plumbing routing, with supply and return lines secured along the boom or stick using hydraulic line mounting brackets.
Guarding and protective options
Cylinder and hose shielding is standard practice on shears of this class to protect plumbing from falling debris during demolition and scrap work. Where the shear is coupler-mounted, a coupler guard kit is typically added to keep debris out of the coupler and pin area, consistent with guarding used broadly across Cat's excavator work-tool line.
All S30 assemblies by section
Every catalogued assembly group for the Caterpillar S30. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Frame And Body
144-0988 Housing Gp-Shear
| 09***05 | Bolt-Socket Head; (M16x2x100-mm) | 3 |
| 10***55 | Plate-Warning | 1 |
| 12***54 | Screw-Flat Head; (M12x1.75x35-mm) | 16 |
156-4984 Housing Gp-Shear
| 09***05 | Bolt-Socket Head; (M16x2x100-mm) | 3 |
| 12***54 | Screw-Flat Head; (M12x1.75x35-mm) | 16 |
| 14***59 | Retainer | 2 |
144-3082 Housing Gp-Shear
| 14***67 | Swivel As | 1 |
| 14***03 | Housing As | 1 |
| 14***14 | Lockwasher | 4 |
144-0965 Housing Gp-Shear
| 09***05 | Bolt-Socket Head; (M16x2x100-mm) | 3 |
| 10***55 | Plate-Warning | 1 |
| 13***24 | Screw-Flat Head | 26 |
144-0973 Housing Gp-Shear
| 09***05 | Bolt-Socket Head; (M16x2x100-mm) | 3 |
| 14***73 | Housing Group-Shear | 1 |
| 14***59 | Retainer | 2 |
144-3072 Housing Gp-Shear
| 09***05 | Bolt-Socket Head; (M16x2x100-mm) | 3 |
| 12***54 | Screw-Flat Head; (M12x1.75x35-mm) | 16 |
| 14***73 | Lockwasher | 16 |
178-6221 Housing Gp-Shear
| 14***67 | Swivel As | 1 |
| 14***93 | Bumper | 8 |
| 14***06 | Bolt-Socket Head; (M20x2.5x140-mm) | 4 |
152-3850 Housing Gp-Shear
| 09***05 | Bolt-Socket Head; (M16x2x100-mm) | 3 |
| 14***59 | Retainer | 2 |
| 14***63 | Lockwasher | 22 |
144-0959 Housing Gp-Shear
| 14***59 | Housing Group-Shear | 1 |
| 14***48 | Pin | 1 |
| 14***52 | Bushing | 2 |
144-3066 Housing Gp-Shear
| 09***05 | Bolt-Socket Head; (M16x2x100-mm) | 3 |
| 12***54 | Screw-Flat Head; (M12x1.75x35-mm) | 16 |
| 14***73 | Lockwasher | 16 |
160-7473 Housing Gp-Shear
| 09***05 | Bolt-Socket Head; (M16x2x100-mm) | 3 |
| 12***54 | Screw-Flat Head; (M12x1.75x35-mm) | 16 |
| 14***63 | Lockwasher | 16 |
144-3063 Housing Gp-Shear
| 09***05 | Bolt-Socket Head; (M16x2x100-mm) | 3 |
| 14***59 | Retainer | 2 |
| 14***63 | Lockwasher | 26 |
144-0998 Housing Gp-Shear
| 14***98 | Housing Group-Shear | 1 |
| 14***67 | Swivel As | 1 |
| 14***03 | Housing As | 1 |
144-0978 Housing Gp-Shear
| 09***05 | Bolt-Socket Head; (M16x2x100-mm) | 3 |
| 10***55 | Plate-Warning | 1 |
| 12***54 | Screw-Flat Head; (M12x1.75x35-mm) | 16 |
144-2762 Mounting Gp-Rotator Cylinder
| 09***06 | Bolt-Socket Head; (M16x2x80-mm) | 8 |
| 14***91 | Coupling | 1 |
| 14***92 | Pin | 1 |
144-3146 Mounting Gp-Rotator Cylinder
| 09***03 | Bolt-Socket Head; (M16x2x75-mm) | 8 |
| 09***05 | Bolt-Socket Head; (M16x2x100-mm) | 8 |
| 14***46 | Mounting Group-Rotator Cylinder | 1 |
144-6146 Mounting Gp-Rotator Cylinder
| 14***97 | Bolt-Socket Head; (M20x2.5x120-mm) | 12 |
| 14***07 | Bolt-Socket Head | 12 |
| 14***46 | Mounting Group-Rotator Cylinder | 1 |
144-4214 Mounting Gp-Rotator Cylinder
| 14***84 | Bolt-Socket Head; (M20x2.5x110-mm) | 14 |
| 14***14 | Mounting Group-Rotator Cylinder | 1 |
| 14***15 | Coupling | 1 |
144-3765 Mounting Gp-Rotator Cylinder
| 14***97 | Bolt-Socket Head; (M20x2.5x120-mm) | 8 |
| 14***65 | Mounting Group-Rotator Cylinder | 1 |
| 14***66 | Coupling | 1 |
144-6042 Mounting Gp-Rotator Cylinder
| 14***42 | Mounting Group-Rotator Cylinder | 1 |
| 14***43 | Coupling | 2 |
| 14***44 | Pin | 2 |
Hydraulic System
144-0975 Cylinder & Lines Gp-Rotator
| 14***75 | Cylinder & Lines Group-Rotator | 1 |
| 14***63 | Cylinder Group-Rotator | 1 |
| 14***65 | Mounting Group-Rotator Cylinder | 1 |
144-1000 Cylinder & Lines Gp-Rotator
| 14***00 | Cylinder & Lines Group-Rotator | 1 |
| 14***12 | Cylinder Group-Rotator | 2 |
| 14***42 | Mounting Group-Rotator Cylinder | 1 |
144-0968 Cylinder & Lines Gp-Rotator
| 14***68 | Cylinder & Lines Group-Rotator | 1 |
| 14***44 | Cylinder Group-Rotator | 1 |
| 14***46 | Mounting Group-Rotator Cylinder | 1 |
144-0980 Cylinder & Lines Gp-Rotator
| 14***80 | Cylinder & Lines Group-Rotator | 1 |
| 14***12 | Cylinder Group-Rotator | 1 |
| 14***14 | Mounting Group-Rotator Cylinder | 1 |
145-6218 Cylinder & Lines Gp-Rotator
| 14***65 | Mounting Group-Rotator Cylinder | 1 |
| 14***00 | Cylinder Group-Rotator | 1 |
| 14***17 | Lines Group-Rotator Cylinder | 1 |
144-0961 Cylinder & Lines Gp-Rotator
| 14***61 | Cylinder & Lines Group-Rotator | 1 |
| 14***34 | Lines Group-Rotator Cylinder | 1 |
| 14***88 | Cylinder Group-Rotator | 1 |
144-0990 Cylinder & Lines Gp-Rotator
| 14***90 | Cylinder & Lines Group-Rotator | 1 |
| 14***44 | Cylinder Group-Rotator | 1 |
| 14***46 | Mounting Group-Rotator Cylinder | 1 |
152-3849 Cylinder & Lines Gp-Shear
| 15***84 | Cylinder Group-Hydraulic | 1 |
| 15***99 | Lines Group-Cylinder | 1 |
| 15***01 | Mounting Group-Cylinder | 1 |
144-0979 Cylinder & Lines Gp-Shear
| 14***79 | Cylinder & Lines Group-Shear | 1 |
| 14***94 | Cylinder Group-Hydraulic | 1 |
| 14***99 | Mounting Group-Cylinder | 1 |
144-0966 Cylinder & Lines Gp-Shear
| 14***66 | Cylinder & Lines Group-Shear | 1 |
| 14***27 | Cylinder Group-Shear | 1 |
| 14***32 | Mounting Group-Cylinder | 1 |
144-0974 Cylinder & Lines Gp-Shear
| 14***74 | Cylinder & Lines Group-Shear | 1 |
| 14***42 | Cylinder Group-Hydraulic | 1 |
| 14***47 | Mounting Group-Cylinder | 1 |
144-0999 Cylinder & Lines Gp-Shear
| 14***99 | Cylinder & Lines Group-Shear | 1 |
| 14***20 | Cylinder Group-Hydraulic | 1 |
| 14***25 | Mounting Group-Cylinder | 1 |
144-0960 Cylinder & Lines Gp-Shear
| 14***60 | Cylinder & Lines Group-Shear | 1 |
| 14***44 | Cylinder Group-Hydraulic | 1 |
| 14***48 | Mounting Group-Cylinder | 1 |
144-0989 Cylinder & Lines Gp-Shear
| 14***89 | Cylinder & Lines Group-Shear | 1 |
| 14***26 | Cylinder Group-Hydraulic | 1 |
| 14***31 | Fuel Filter; Sieve, Fuel Filter, Mounting Group-Cylinder | 1 |
158-3051 Cylinder Gp-Hydraulic
| 03***25 | Ring-Backup | 2 |
| 08***91 | Ring-Backup | 1 |
| 08***93 | Ring-Retaining | 1 |
144-4194 Cylinder Gp-Hydraulic
| 09***13 | Ring | 4 |
| 09***77 | Setscrew-Socket | 1 |
| 14***94 | Cylinder Group-Hydraulic | 1 |
160-8244 Cylinder Gp-Hydraulic -Y
| 00***50 | Seal-O-Ring | 1 |
| 10***96 | Ring-Retaining | 4 |
| 10***25 | Seal As | 1 |
145-3750 Cylinder Gp-Hydraulic
| 03***25 | Ring-Backup | 1 |
| 09***33 | Seal-O-Ring; (Id=209.30mm) | 1 |
| 10***86 | Ring-Retaining | 1 |
144-3742 Cylinder Gp-Hydraulic
| 09***77 | Setscrew-Socket | 1 |
| 14***31 | Ring-Retaining | 4 |
| 14***42 | Cylinder Group-Hydraulic | 1 |
144-2744 Cylinder Gp-Hydraulic
| 14***44 | Cylinder Group-Hydraulic | 1 |
| 14***45 | Seal Set | 1 |
| 14***31 | Ring-Retaining | 4 |
152-3684 Cylinder Gp-Hydraulic
| 03***25 | Ring-Backup | 2 |
| 09***33 | Seal-O-Ring; (Id=209.30mm) | 1 |
| 10***86 | Ring-Retaining | 1 |
144-6126 Cylinder Gp-Hydraulic
| 09***77 | Setscrew-Socket | 1 |
| 10***60 | Ring-Retaining | 4 |
| 14***06 | Bolt-Socket Head; (M20x2.5x140-mm) | 18 |
144-6020 Cylinder Gp-Hydraulic
| 10***96 | Ring-Retaining | 4 |
| 14***20 | Cylinder Group-Hydraulic | 1 |
| 14***22 | Seal Set | 1 |
144-4212 Cylinder Gp-Rotator
| 14***81 | Piston Group-Cylinder | 1 |
| 14***12 | Cylinder Group-Rotator | 1 |
| 14***13 | Kit-Seal | 1 |
144-6144 Cylinder Gp-Rotator
| 14***44 | Cylinder Group-Rotator | 1 |
| 14***00 | Kit-Seal | 1 |
144-3144 Cylinder Gp-Rotator
| 14***44 | Cylinder Group-Rotator | 1 |
| 14***52 | Kit-Seal | 1 |
145-5740 Cylinder Gp-Rotator
| 14***71 | Ring-Backup | 1 |
| 14***70 | Piston Group-Cylinder | 1 |
| 14***15 | Quad-Ring | 1 |
145-5800 Cylinder Gp-Rotator
| 09***06 | Bolt-Socket Head; (M16x2x80-mm) | 12 |
| 14***60 | Piston | 1 |
| 14***19 | Ring-Quad | 1 |
144-3763 Cylinder Gp-Rotator
| 14***63 | Cylinder Group-Rotator | 1 |
| 14***22 | Kit-Seal | 1 |
144-2488 Cylinder Gp-Rotator
| 03***92 | Seal; (126.59mm Id) | 2 |
| 14***88 | Cylinder Group-Rotator | 1 |
| 14***89 | Seal Set | 1 |
145-5752 Cylinder Gp-Rotator
| 13***80 | Plug | 2 |
| 14***79 | Piston Group-Cylinder | 1 |
| 14***17 | Ring-Quad | 1 |
144-3127 Cylinder Gp-Shear
| 09***77 | Setscrew-Socket | 1 |
| 14***27 | Cylinder Group-Shear | 1 |
| 14***31 | Ring-Retaining | 4 |
145-3751 Cylinder Gp-Shear
| 03***25 | Ring-Backup | 2 |
| 08***48 | Ring | 1 |
| 09***31 | Seal-O-Ring | 1 |
144-3752 Lines Gp-Cylinder
| 09***70 | Bolt-Socket Hd; (M12 X 1.75 X 45) | 24 |
| 12***88 | Flange-Split | 28 |
| 14***16 | Plate | 2 |
144-3137 Lines Gp-Cylinder
| 09***70 | Bolt-Socket Hd; (M12 X 1.75 X 45) | 24 |
| 14***79 | Lockwasher | 24 |
| 14***73 | Lockwasher | 16 |
152-3699 Lines Gp-Cylinder
| 14***88 | Connector | 2 |
| 14***98 | Grommet | 2 |
| 15***17 | Hose As | 2 |
144-4205 Lines Gp-Cylinder
| 14***05 | Lines Group-Cylinder | 1 |
| 14***88 | Connector | 2 |
| 14***32 | Fitting | 2 |
144-6029 Lines Gp-Cylinder
| 09***76 | Nut; (M14x2-Thd) | 16 |
| 14***60 | Fitting | 2 |
| 14***88 | Connector | 2 |
144-2752 Lines Gp-Cylinder
| 14***52 | Lines Group-Cylinder | 1 |
| 14***60 | Fitting | 2 |
| 14***88 | Connector | 2 |
144-6136 Lines Gp-Cylinder
| 14***88 | Connector | 2 |
| 14***36 | Lines Group-Cylinder | 1 |
| 14***31 | Hose As | 2 |
144-3151 Lines Gp-Rotator Cylinder
| 14***56 | Valve Group-Pressure Control | 1 |
| 14***61 | Accumulator | 2 |
| 14***62 | Plate | 1 |
144-6045 Lines Gp-Rotator Cylinder
| 11***11 | Clamp | 1 |
| 14***73 | Lockwasher | 4 |
| 14***68 | Fitting | 2 |
144-1034 Lines Gp-Rotator Cylinder
| 14***34 | Lines Group-Rotator Cylinder | 1 |
| 14***56 | Valve Group-Pressure Control | 1 |
| 14***61 | Accumulator | 2 |
144-3773 Lines Gp-Rotator Cylinder
| 14***56 | Valve Group-Pressure Control | 1 |
| 14***61 | Accumulator | 2 |
| 14***68 | Fitting | 2 |
144-6150 Lines Gp-Rotator Cylinder
| 14***56 | Valve Group-Pressure Control | 1 |
| 14***61 | Accumulator | 2 |
| 14***62 | Plate | 1 |
144-4451 Lines Gp-Rotator Cylinder
| 14***56 | Valve Group-Pressure Control | 1 |
| 14***61 | Accumulator | 2 |
| 14***62 | Plate | 1 |
145-6217 Lines Gp-Rotator Cylinder
| 14***56 | Valve Group-Pressure Control | 1 |
| 14***61 | Accumulator | 2 |
| 14***72 | Plate | 2 |
144-2748 Mounting Gp-Cylinder
| 14***42 | Plate | 2 |
| 14***48 | Mounting Group-Cylinder | 1 |
| 14***49 | Pin As | 1 |
144-6025 Mounting Gp-Cylinder
| 14***69 | Screw | 4 |
| 14***25 | Mounting Group-Cylinder | 1 |
| 14***26 | Pin As | 1 |
144-6131 Mounting Gp-Cylinder
| 14***31 | Fuel Filter; Sieve, Fuel Filter, Mounting Group-Cylinder | 1 |
| 14***32 | Plug; Dummy Plug, Plug, Pin As | 1 |
| 14***33 | Pin As, Chain | 1 |
144-3747 Mounting Gp-Cylinder
| 14***42 | Plate | 2 |
| 14***47 | Mounting Group-Cylinder | 1 |
| 14***48 | Pin As | 1 |
152-3701 Mounting Gp-Cylinder
| 14***01 | Pin As | 1 |
| 14***02 | Spacer; (120.5x150x7-mm Thk) | 2 |
| 14***03 | Spacer; (120.5x150x18-mm Thk) | 2 |
144-3132 Mounting Gp-Cylinder
| 14***42 | Plate | 2 |
| 14***32 | Mounting Group-Cylinder | 1 |
| 14***33 | Pin As | 1 |
144-4199 Mounting Gp-Cylinder
| 14***99 | Mounting Group-Cylinder | 1 |
| 14***00 | Pin As | 1 |
| 14***01 | Pin As | 1 |
149-4592 Valve Gp-Pressure Control
| 14***88 | Connector | 2 |
| 14***92 | Valve Group-Pressure Control | 1 |
| 17***45 | Valve Group-Relief | 2 |
144-1056 Valve Gp-Pressure Control
| 14***56 | Valve Group-Pressure Control | 1 |
| 14***88 | Connector | 2 |
| 17***54 | Valve Group-Relief | 2 |
165-8920 Valve Gp-Relief
| 16***20 | Valve Group-Relief | 1 |
| 17***12 | Seal-Bonded | 1 |
| 17***13 | Seal-O-Ring | 1 |
179-1254 Valve Gp-Relief
| 17***54 | Valve Group-Relief | 1 |
| 6V***06 | Seal-Bonded | 1 |
| 6V***80 | Seal-O-Ring; (20.35mm Id) | 1 |
179-1745 Valve Gp-Relief
| 17***45 | Valve Group-Relief | 1 |
| 6V***06 | Seal-Bonded | 1 |
| 6V***80 | Seal-O-Ring; (20.35mm Id) | 1 |
Service Equipment And Supplies
164-6368 Plate & Film Gp
| 10***45 | Film-Identification; (Cat) | 2 |
| 11***51 | Film-Stripe; (98 cm) | 0 |
| 14***36 | Film-Warning; (Flying Debris) | 2 |
164-7186 Plate & Film Gp
| 10***45 | Film-Identification; (Cat) | 2 |
| 11***51 | Film-Stripe; (98 cm) | 0 |
| 14***36 | Film-Warning; (Flying Debris) | 2 |
173-3784 Plate & Film Gp
| 10***45 | Film-Identification; (Cat) | 2 |
| 11***51 | Film-Stripe; (98 cm) | 0 |
| 14***36 | Film-Warning; (Flying Debris) | 2 |
164-7189 Plate & Film Gp
| 10***45 | Film-Identification; (Cat) | 2 |
| 11***51 | Film-Stripe; (98 cm) | 0 |
| 14***36 | Film-Warning; (Flying Debris) | 2 |
158-2129 Plate & Film Gp
| 10***45 | Film-Identification; (Cat) | 2 |
| 11***51 | Film-Stripe; (98 cm) | 0 |
| 14***36 | Film-Warning; (Flying Debris) | 2 |
164-7191 Plate & Film Gp
| 10***45 | Film-Identification; (Cat) | 2 |
| 11***51 | Film-Stripe; (98 cm) | 0 |
| 14***36 | Film-Warning; (Flying Debris) | 2 |
Work Tool Arrangement
144-0977 Shear Ar-Hydraulic
| 14***77 | Shear Ar-Hydraulic | 1 |
| 14***78 | Housing Group-Shear | 1 |
| 14***79 | Cylinder & Lines Group-Shear | 1 |
144-3065 Shear Ar-Hydraulic
| 14***79 | Cylinder & Lines Group-Shear | 1 |
| 14***80 | Cylinder & Lines Group-Rotator | 1 |
| 14***65 | Shear Ar-Hydraulic | 1 |
144-3081 Shear Ar-Hydraulic
| 14***99 | Cylinder & Lines Group-Shear | 1 |
| 14***00 | Cylinder & Lines Group-Rotator | 1 |
| 14***81 | Shear Ar-Hydraulic | 1 |
144-0997 Shear Ar-Hydraulic
| 14***97 | Shear Ar-Hydraulic | 1 |
| 14***98 | Housing Group-Shear | 1 |
| 14***99 | Cylinder & Lines Group-Shear | 1 |
144-0972 Shear Ar-Hydraulic
| 14***72 | Shear Ar-Hydraulic | 1 |
| 14***73 | Housing Group-Shear | 1 |
| 14***74 | Cylinder & Lines Group-Shear | 1 |
144-3071 Shear Ar-Hydraulic
| 14***89 | Cylinder & Lines Group-Shear | 1 |
| 14***90 | Cylinder & Lines Group-Rotator | 1 |
| 14***71 | Shear Ar-Hydraulic | 1 |
144-0987 Shear Ar-Hydraulic
| 14***87 | Shear Ar-Hydraulic | 1 |
| 14***88 | Housing Group-Shear | 1 |
| 14***89 | Cylinder & Lines Group-Shear | 1 |
144-3062 Shear Ar-Hydraulic
| 14***74 | Cylinder & Lines Group-Shear | 1 |
| 14***75 | Cylinder & Lines Group-Rotator | 1 |
| 14***62 | Shear Ar-Hydraulic | 1 |
144-0963 Shear Ar-Hydraulic
| 14***63 | Shear Ar-Hydraulic | 1 |
| 14***65 | Housing Group-Shear | 1 |
| 14***66 | Cylinder & Lines Group-Shear | 1 |
155-4962 Shear Ar-Hydraulic
| 14***79 | Cylinder & Lines Group-Shear | 1 |
| 14***80 | Cylinder & Lines Group-Rotator | 1 |
| 15***62 | Shear Ar-Hydraulic | 1 |
144-0958 Shear Ar-Hydraulic
| 14***58 | Shear Ar-Hydraulic | 1 |
| 14***59 | Housing Group-Shear | 1 |
| 14***60 | Cylinder & Lines Group-Shear | 1 |
152-3848 Shear Ar-Hydraulic
| 14***18 | Cylinder & Lines Group-Rotator | 1 |
| 15***86 | Edge Group-Cutting | 1 |
| 15***48 | Shear Ar-Hydraulic | 1 |
158-4935 Shear Ar-Hydraulic
| 14***89 | Cylinder & Lines Group-Shear | 1 |
| 14***90 | Cylinder & Lines Group-Rotator | 1 |
| 15***35 | Shear Ar-Hydraulic | 1 |
178-6218 Shear Ar-Hydraulic
| 14***99 | Cylinder & Lines Group-Shear | 1 |
| 14***00 | Cylinder & Lines Group-Rotator | 1 |
| 17***84 | Plate & Film Group | 1 |
Work Tools
210-2310 Bracket Gp-Mounting
| 09***96 | Bolt; (M20x2.5-Thd) | 12 |
| 21***10 | Bracket Group-Mounting | 1 |
| 21***12 | Bracket As | 1 |
209-0575 Bracket Gp-Mounting
| 09***49 | Washer; (22x60x6-mm Thk) | 1 |
| 10***96 | Bearing-Sleeve | 2 |
| 20***75 | Bracket Group-Mounting | 1 |
199-2418 Bracket Gp-Mounting
| 09***48 | Nipple, Grease | 2 |
| 09***79 | Nut; (M36x4.0 Thd) | 12 |
| 13***21 | Bearing-Sleeve; (130.24mm Od) | 2 |
144-0991 Edge Gp-Cutting
| 14***91 | Edge Group-Cutting | 1 |
| 14***87 | Screw-Flat Head | 8 |
| 14***06 | Shim; (1-mm Thk) | 1 |
144-1001 Edge Gp-Cutting
| 14***01 | Edge Group-Cutting | 1 |
| 14***65 | Screw-Flat Head; (M24x3x180mm) | 13 |
| 14***66 | Screw-Flat Head; (M24x3x160-mm) | 2 |
144-3067 Edge Gp-Cutting
| 14***15 | Screw-Flat Head; (M20x2.5x100-mm) | 2 |
| 14***67 | Edge Group-Cutting | 1 |
| 14***87 | Screw-Flat Head | 12 |
144-3073 Edge Gp-Cutting
| 14***73 | Edge Group-Cutting | 1 |
| 14***87 | Screw-Flat Head | 8 |
| 14***36 | Tip-Wear | 1 |
152-3686 Edge Gp-Cutting
| 14***89 | Screw-Flat Head | 9 |
| 15***86 | Edge Group-Cutting | 1 |
| 15***91 | Shim; (1mm Thk) | 4 |
156-4985 Edge Gp-Cutting
| 14***15 | Screw-Flat Head; (M20x2.5x100-mm) | 1 |
| 14***87 | Screw-Flat Head | 13 |
| 14***78 | Lockwasher | 14 |
144-3064 Edge Gp-Cutting
| 14***87 | Screw-Flat Head | 2 |
| 14***64 | Edge Group-Cutting | 1 |
| 14***87 | Screw-Flat Head | 12 |
144-3083 Edge Gp-Cutting
| 14***83 | Edge Group-Cutting | 1 |
| 14***65 | Screw-Flat Head; (M24x3x180mm) | 14 |
| 14***66 | Screw-Flat Head; (M24x3x160-mm) | 2 |
144-0969 Edge Gp-Cutting
| 14***69 | Edge Group-Cutting | 1 |
| 14***15 | Screw-Flat Head; (M20x2.5x100-mm) | 2 |
| 14***87 | Screw-Flat Head | 8 |
144-0976 Edge Gp-Cutting
| 14***76 | Edge Group-Cutting | 1 |
| 14***87 | Screw-Flat Head | 2 |
| 14***87 | Screw-Flat Head | 6 |
178-6223 Edge Gp-Cutting
| 14***65 | Screw-Flat Head; (M24x3x180mm) | 13 |
| 14***66 | Screw-Flat Head; (M24x3x160-mm) | 3 |
| 14***96 | Shim; (1mm Thk) | 1 |
160-7476 Edge Gp-Cutting
| 14***87 | Screw-Flat Head | 8 |
| 14***81 | Screw-Flat Head | 6 |
| 14***78 | Lockwasher | 14 |
144-0981 Edge Gp-Cutting
| 14***81 | Edge Group-Cutting | 1 |
| 14***15 | Screw-Flat Head; (M20x2.5x100-mm) | 2 |
| 14***87 | Screw-Flat Head | 6 |
144-0962 Edge Gp-Cutting
| 14***62 | Edge Group-Cutting | 1 |
| 14***87 | Screw-Flat Head | 4 |
| 14***98 | Screw-Flat Head; (M20x2.5x90-mm) | 2 |
S30 serial number reference
On this shear the product ID plate is riveted to the housing near the rotator mount or top link bracket, not on a cab or engine block, since the tool has no engine of its own. Read the first three characters of the PIN as the serial-number prefix (identifies the specific model/build series) and the digits after it as the individual unit sequence number. If the plate is worn, the same prefix is usually stamped into the housing casting near the pivot pin bore.
| Prefix | Identifies | Notes |
|---|---|---|
| 8WS | S30 demolition/scrap shear | Appears as the S30 entry in a combined S30/S40/S50/S60 shear parts-manual listing, with 8WS aligned to S30 and 3BW/3KW/4FW to the S40/S50/S60 siblings in the same listing. Single-source; confirm with a dealer before using for parts lookup. |
Frequently asked questions
What powers the Cat S30 shear? Does it have an engine?
No. The S30 is a passive hydraulic attachment with no engine, ECM, or fault codes of its own. It runs entirely off the auxiliary hydraulic circuit of the excavator it is mounted on.
What does the Cat S30 weigh?
No official factory spec sheet for the S30 survives in general circulation, so a confirmed operating weight cannot be stated. As a mid-size member of the S25 through S130 legacy family, it was sized for smaller-to-mid-class excavators, lighter than the modern S3000-series shears that start around 7 metric tons for larger carrier classes.
What replaced the Cat S30 shear?
Caterpillar's current mobile shear lineup is the S2000 (straight) and S3000 (rotating) series, including models like the S3015, S3025, and S3035, which cover excavator classes comparable to the legacy S25-S130 family with updated jaw and blade design.
What S30 owners discuss
Does the S30 shear have its own engine or power source?
What jaw and blade wear pattern should an owner expect?
Are pin and bushing wear quirks specific to the S30, or typical of shears generally?
What hose, seal, or cylinder issues come up most with this class of shear?
What should a buyer check on the rotator on a used S30?
How critical is matching the S30 to the carrier's hydraulic flow and pressure?
What should someone check before buying a used S30 shear?
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Need a specific S30 part?
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