Pyramid Parts

Direct replacement parts for blasthole drills

Pyramid Parts offers the full line of replacement parts for Caterpillar and Bucyrus drills, including models 49R series, 49HR and MD6640. In addition to supplying a broad selection of standard parts, we offer many of those same components with design enhancements to provide long service life and great value. 

• Wide range of mechanical and electrical components  
• Meets or exceeds OEM specifications  
• One-year/6,000-hour warranty 

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1570W and 8050 planetary swing upgrade system

P&H planetary transmissions are designed for the severe duty that is demanded for mining materials in harsh climates. These units provide longer periods between rebuild than parallel shaft or split power swing gearboxes. The P&H transmission is significantly larger and more robust than off-the-shelf planetary transmissions but is comparatively more compact than the parallel shaft swing gearboxes. Replacing parallel shaft swing gearboxes with planetary transmissions eliminates the need for swing timing. The replacement will also provide added deck space around the swing units for inspection and maintenance access.

Other features and advantages:

• Field demonstrated long life, in excess of 70,000 hours before rebuild is required
• Easily removed as a unit, enabling rebuilds in a shop environment
• Improved swing shaft and lower bearing proving better pinion to rack alignment over parallel shaft or split power swing gearboxes
• Available option for RTD monitoring of bearing and oil temperatures
• Optional disc brake available

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320XPC crawler drive upgrade

The 320XPC Crawler Drive Upgrade increases the width of the load bearing surfaces, reducing stress levels. This innovative design increases life over OEM lower work components.

• 8.9 cm (3.5 in) wide lower roller uses existing P&H spin hardened process
• 8.9 cm (3.5 in) wide front idler
• Heavy-duty 320XPC crawler shoes

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8200 gear case upgrade

The OEM hoist and drag gear cases on the Marion 8200 are fabricated from plate steel reinforced by thin section stiffener plates, fillet welded to the main case walls. With the natural flexing of the rotating frame, this gear case can also flex and cause pinion/gear misalignment that may compromise the life of the gearing and result in reduced reliability and availability. Flexing may also result in fatigue and cracking of stiffener plates, as well as oils leaks around the pinion bearings and case lip parting faces. 

Are you looking for a cost-effective gear case solution? This case has 100 mm (4 in) side walls and base plates to minimize flexing during operation. The case also incorporates extensive use of full penetration welds and weld grinding. This innovative design provides:  

• Maintenance of good pinion/gear alignment  
• Elimination of stiffener plate cracking  
• Improved fatigue performance
• Double oil seal retainers and O-ring seal on the lid minimize oil leakage  

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Bolt-on replacement swing rack

Designed for durability and simplified maintainability. Thermally stress-relieved fabrication and forged alloy rack offer improved fatigue life over the cast version. The bolt-on replacement swing rack eliminates the need to remove the entire assembly to replace the rack. 

• Bolt-on swing rack for easy replacement  
• P&H-designed swing rack  
• Fabricated and machined base using full penetration welds 
• Swing rack secured by body-fit bolts and super nuts 
• Upper and lower rails, roller circle and swing pinions also available
• Complimentary swing system components available

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Boom replacement

Tubular booms on walking draglines may require intensive maintenance as the structure ages and fatigues. Weld joints — especially those for lacing joints — are not easily inspected, so condition monitoring is a challenge. These joints may suffer continued cracking and require frequent inspection and weld repair. A solution to this is replacement of the original tubular boom with the P&H four-chord boom using wide flange beams for the chords.

• OEM approach to boom replacement by analyzing the many components on the dragline directly affected by the boom
• The P&H boom has a geometry that balances axial working loads on each chord and a flatter bottom on the boom for good operator visibility
• Solid modeling is used for FEA analysis
• Any configuration change will be within the specifications of the original machine capability

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Direct replacement parts for electric mining shovels

Make Pyramid Parts your reliable single source of parts for your Caterpillar, Bucyrus and Marion shovel fleet. You’ll find parts for older models such as the 190B and 191M, up through the latest models, including the Cat 7495 series. 

Other features and advantages: 

• Meets or exceeds OEM specifications 
• Many parts and components offered with design enhancements aimed at providing greater life and ease of maintenance  
• One-year/6,000-hour warranty 

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Direct replacement parts for draglines

You’ll find a full line of replacement parts for Bucyrus, Marion and Caterpillar walking draglines at Pyramid Parts. All gears, pinion shafts and splined shafting are manufactured to the OEM’s AGMA design quality level or better. You’ll also find other major mechanical items including, rack, rail and roller sets, cams and camshafts, many with structural and major mechanical design enhancements.

Other features and advantages:

• Meets or exceeds OEM specifications
• Many components offered with design enhancements
• One-year/6,000-hour warranty

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HD crawler shoes

The HD Drill Crawler Shoe for 49R series and MD 6640 blasthole drills provides increased drive lug thickness and additional internal stiffeners running from male to female lugs.

• Drive lug thickness increased over OEM to reduce contact stress and wear introduced by the drive tumbler
• Increased internal stiffeners between male and female shoe lugs on HD crawler shoe over standard direct replacement crawler shoe stiffeners — provides added strength while helping prevent track stretch

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Improved crawler frames for blasthole drills

P&H style side frames are engineered to be used as direct replacement with OEM side frames with structural improvements for 49R series and MD6640 blasthole drills. This improved crawler frame is available in two configurations: OEM replacement side frame with cast transmission mount and OEM replacement side frame with fabricated transmission mount (Based on P&H 320 drill style).

Changes include:

• Weld improvements
• Plate changes
• Machining changes
• Lubrication guard changes

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Maintenance boarding stairway

Climbing on and off mining and construction equipment can be challenging due to the distance from the ground to the first step. This is especially true on maintenance days when your teams need frequent access to the dragline and are carrying heavy tools and parts. The P&H boarding stairway is adaptable for all brands of draglines. This handy stairway facilitates easier access and convenience for maintenance personnel, supervisors and others who may need to board a machine on those occasions when it is idled for maintenance. 

• Provides easy access from ground directly to deck level  
• Facilitates carrying of tools and other items  
• Adds convenience for maintenance personnel during extended maintenance periods  
• Simple operation for raising and lowering stairway  
• Available for all brands of draglines 

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P&H 10- and 11-inch delta conversions

The P&H 10- and 11-inch Delta (Deep Engaging Long-Life Track Assembly) lower works conversion for Bucyrus 495 and Cat 7495 series shovels incorporate low-maintenance design features available on P&H shovels. The 10-inch conversion captures features of the P&H 2800 series shovel and components from the conversion are interchangeable with the P&H 2800. The 11-inch conversion captures features of the P&H 4100 series shovel and components from the conversion are interchangeable with the P&H 4100. 

• Customer case studies demonstrate improved life — up to 26,500 hours on the 10-inch Delta conversion 
• Longer crawler system life helps decreases change-out intervals — promotes reduction in employee exposure to risks from system and component replacements  
• Design incorporates added material  
• The Delta system offers smoother operation, lower track tension and lower stress — results in extended component life and reduced down time compared to other manufacturers' lower works 

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P&H crawler frame upgrade

P&H side frames have been proven in severe duty applications. This same engineering and manufacturing expertise has now been applied to the design of non-P&H structures, models 495HR, 495HF and 7495. FEA and strain gauge studies helped drive design improvements, resulting in an improved structural life of up to 60,000 hours. Upgrades can be supplied in the multiple configurations including bare frames, assembled with OEM equivalent components, and with the 10-inch or 11-inch Delta conversion with grease lines and covers. 

• Extended structural life
• Increased inner and outer wall plate thickness
• Continuous welded guide rail eliminates cross welds
• Increased clearance between frame and crawler shoes
• Interchangeable with OEM side frames 

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P&H final drive upgrade

P&H lower works systems have been proven in severe-duty applications. This same engineering and manufacturing expertise has now been applied to the design of parts for non-P&H undercarriages. The Final Drive upgrade allows the drive shaft to be removed from the out-board side of the crawler frame on CAT 7495 and Bucyrus 495 series shovels. This eliminates the need to decouple the motor and remove the transmission to replace the final drive shaft, dramatically reducing the maintenance downtime associated with replacement of these lower works components.

• Extended component life — increased spline length between tumbler and shaft interface reduces stresses on the spline 
• Additional thrust support — oversized thrust surfaces mounted to the crawler frame promotes increased bearing life by removing axial loads transferred through the bearing capsule  
• Smart design — sealing arrangement engineered to help keep dirt out and grease in place to keep bearings running clean  
• Decreased maintenance time — once installed, it is no longer necessary to realign and recouple the transmission and motor 
   

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P&H rotary motors

Pyramid Parts can provide heavy-duty DC motors for 49R series drills. The P&H 135-hp K-504T and 90-hp K-406T can be retrofitted to use in rotatory applications.

• Provides more heat-absorbing iron for lower heat stress
• Runs cooler for longer life
• Withstands higher peaks of current

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Standard- and heavy-duty dual-acting dipper door snubbers

Mitigate structural damage; dual-acting hydraulic snubbers significantly reduce dipper door impacts with dipper body during the dig cycle. Available in the standard-duty configuration and heavy-duty for larger or heavier dipper doors, the heavy-duty snubber provides more than 2.5 times the snubbing force of the standard snubber.

• Reduces dipper door closing impacts 
• Mitigates potential door cracking
• Decreases dipper body cracking

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P&H sure wrench for blasthole drills

Designed for the tough mining conditions, the P&H Sure Wrench provides exceptional efficiency and resistance to wear. It allows for one-person operation of pipe breaking from the operator console control and is compatible with all P&H drills as well as most other manufacturers’ drills. Wrench sizes to accommodate pipe diameters 178-365 mm (7 to 14-3/8 in). Faster pipe change-outs for increased productivity.

• Increased breaking cylinder stroke and breaking torque
• Floating dies allow for up to three degrees pipe taper per side
• Dual-jaw clamping accommodates up to 44 mm (1.75 in) wear on pipe diameter
• Tapered guide slot design to extend bushing life
• Bracket upgrade helps prevent premature wear to pivot pins and brackets

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Tub replacement options

With Pyramid Parts, you gain access to engineering and manufacturing expertise that can provide tubs that adhere to your design preference. Along with the radial and grid designs traditionally found on most of draglines, we also provide our own unique Gradial Tub design. We have been involved with more than 40 tub designs and installations and our experienced personnel are available to assist you with finalizing your scope definitions, including guiding you through cost/benefit exercises.

We will also work with our customers on any customization that may be required to reduce or ease maintenance, such as:

• Bolted/sealed manhole covers
• Man-way through roller circle diaphragm
• External man-way access through outside radial wall
• Custom pinion removal stands
• Many other customizable options

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