Spectra 010897-99S Replacement KNOBS (2 Pack) for LR30, LR30W, LR50, LR50W, LR60 and LR60W

Keep Your LR Series Receiver Secured and Ready for Work

The Spectra Precision 010897-99S is a factory-original 2-pack of replacement thumb screw knobs engineered specifically for LR series machine control receivers. These knobs secure your receiver to its mounting clamp on the mast or blade of your grading or excavating equipment. When field hardware goes missing, strips out, or takes a hit on the jobsite, having a set of genuine Spectra replacement knobs on hand means zero downtime waiting on parts. Designed to factory specification, these knobs deliver the same snug, reliable hold as the originals.

Overview and Jobsite Applications

Machine control systems live in harsh environments — constant vibration, mud, dust, and repeated handling by operators and technicians. The thumb screw knobs on LR series receivers are small but critical: they are the primary fastener keeping a receiver locked to its rod holder or clamp bracket during active grading, dozing, and excavation work. A loose or missing knob means your receiver can shift mid-cut, introducing grade error or forcing a work stoppage. The Spectra 010897-99S restores that connection with hardware that is dimensionally identical to what shipped with the unit, so fit is never a guessing game. Keep a set in your service truck, tool bag, or equipment box and your crews stay productive.

Key Specifications

• Part Number: 010897-99S
• Pack Quantity: 2 knobs per pack
• Hardware Type: Thumb screw knobs (hand-tightenable)
• OEM/Aftermarket: Factory-original Spectra Precision part
• Compatible Receiver Series: LR30, LR30W, LR50, LR50W, LR60, LR60W
• Application: Receiver-to-clamp mounting security
• Brand: Spectra Precision

Key Features

• Factory-original hardware — identical dimensions and thread profile to OEM knobs
• 2-pack value — replace both knobs simultaneously or keep one as a spare
• Tool-free hand tightening for fast receiver installation and removal in the field
• Durable construction withstands vibration, moisture, and repeated use on heavy equipment
• Direct compatibility with six LR series receiver models including W-variant receivers
• Genuine Spectra Precision part ensures warranty integrity and proper fit

Job Applications

Finish Grading: Secure your LR50 or LR60 receiver to the mast clamp on a motor grader during fine grading passes. Properly torqued knobs prevent receiver shift that would introduce elevation error across a finished subgrade.

Dozer Blade Control: On dozer setups running LR30 or LR30W receivers, the constant shock load of pushing material demands tight, reliable knob engagement. Replace worn or missing knobs before starting a cut to maintain grade accuracy throughout the push.

Excavator Depth Control: LR series receivers mounted to excavator stick or bucket brackets see repeated repositioning throughout the day. Thumb screw knobs that tighten and release quickly keep operators moving without reaching for tools.

Field Service and Maintenance: Equipment technicians servicing machine control systems on a fleet should stock 010897-99S packs as standard consumable hardware alongside batteries and cables. Replacing knobs during routine service prevents unplanned downtime in the field.

Compatible Accessories

• Spectra LR50 Machine Control Receiver
• Spectra LR60 Machine Control Receiver
• Spectra LR30 Machine Control Receiver
• Spectra Rod Clamp and Mounting Bracket Assemblies
• Spectra Replacement Cables for LR Series Receivers

Related Guides

• How to Mount and Secure an LR Series Machine Control Receiver
• Machine Control Receiver Maintenance and Field Service Tips
• Spectra Precision LR Series Receiver Compatibility Guide

Frequently Asked Questions

Which Spectra receivers does the 010897-99S fit?

The 010897-99S is compatible with the LR30, LR30W, LR50, LR50W, LR60, and LR60W machine control receivers. If you are running any of these units on your equipment, these are the correct factory-replacement knobs.

How many knobs come in one pack?

Each 010897-99S package contains two (2) replacement thumb screw knobs, allowing you to replace both mounting knobs on a single receiver or keep one as a field spare.

Are these OEM Spectra parts or aftermarket replacements?

These are genuine factory-original Spectra Precision parts. They are manufactured to the same specification as the hardware supplied with new LR series receivers, ensuring correct thread fit and clamping force.

Can I tighten these by hand or do I need a tool?

The 010897-99S knobs are thumb screw style and are designed to be hand-tightened without any tools. This allows for quick receiver mounting and removal directly on the machine, which is particularly useful during grade setup and repositioning throughout the workday.