Allen-Bradley 1336T-GT1-SP34B Maintenance Spare Part

Overview

Allen-Bradley 1336T-GT1-SP34B Maintenance Spare Part for Factory Uptime

The Allen-Bradley 1336T-GT1-SP34B is an original control board designed for the 1336 PLUS series AC variable frequency drives, manufactured by Rockwell Automation. This spare part plays a critical role in maintaining continuous motor control operations across manufacturing lines, process plants, and heavy industrial environments. Whether you are managing a scheduled annual overhaul, responding to an unplanned drive fault, or building a strategic spare parts inventory for aging 1336 PLUS systems, the 1336T-GT1-SP34B is a foundational component that maintenance and procurement engineers must keep on hand.

The 1336 PLUS drive platform has been widely deployed in conveyors, pumps, compressors, fans, and precision motion applications. As these systems age, the control board becomes one of the highest-priority replacement items due to its exposure to thermal cycling, vibration, and capacitor degradation over time. Sourcing an original 1336T-GT1-SP34B — rather than an unverified substitute — ensures full firmware compatibility, correct gate drive timing, and reliable fault diagnostics without requiring drive reconfiguration.

Each unit shipped from KNMKS undergoes functional verification and visual inspection before dispatch. All spare parts are covered by a support terms confirmed by quotation, and long-term supply continuity is supported for customers managing multi-site maintenance programs or legacy system life extension projects.

Spare Maintenance Table

Maintenance Planning for Continuous Operation

When replacing the 1336T-GT1-SP34B in the field, a thorough maintenance engineer will not stop at the control board alone. The 1336 PLUS drive architecture integrates multiple interdependent subsystems, and a board failure is frequently a symptom of broader electrical stress within the cabinet. During the same maintenance window, it is best practice to inspect and — where service life has been exceeded — replace the following components:

The 1336-PB (Power Interface Board) and associated gate driver circuitry should be checked for carbon tracking or burnt traces, particularly if the control board failure was preceded by overcurrent or ground fault events. The 1336-MOD-L2E or 1336-MOD-L3E communication adapter modules, if installed, should be reseated and tested for DeviceNet or DH+ link integrity, as communication faults can cascade into drive trips that are misdiagnosed as control board failures.

The 1336-BRF (brake resistor assembly) and associated dynamic braking circuit should be inspected for resistor degradation, especially in high-cycle applications such as hoists or centrifuges. Simultaneously, the 24VDC control power supply feeding the logic board should be measured under load — a sagging supply rail is a common root cause of intermittent control board resets that appear as random faults.

Terminal blocks, I/O wiring, and analog signal cables connected to the drive’s speed reference and enable inputs should be inspected for insulation breakdown, loose ferrules, or corrosion, particularly in humid or chemically aggressive environments. If the installation includes a 1336-GM1 or 1336-GM2 operator interface (HMI panel), verify that the keypad ribbon cable and display are functional, as a failed HMI can prevent parameter access during commissioning of the replacement board.

For sites running multiple 1336 PLUS drives in a common bus configuration, it is advisable to also inspect the bus fuses and MOV surge suppressors at the drive input terminals. A single drive fault caused by a failing control board can generate voltage transients that stress adjacent drives on the same bus. Proactive replacement of input fuses and surge protection components during the same outage window reduces the risk of secondary failures during restart.

Site Replacement Workflow

Replacing the 1336T-GT1-SP34B on-site is a structured process that, when followed correctly, minimizes downtime and eliminates the risk of commissioning errors. Begin by documenting all drive parameters using the existing HMI or a connected programming terminal running RSLogix or DriveExplorer software — parameter backup is essential before any board swap, as some firmware revisions do not retain parameters across control board replacements.

De-energize the drive and verify that the DC bus voltage has discharged below 50VDC using a calibrated meter before opening the drive enclosure. Remove the existing control board by disconnecting all ribbon cables and I/O connectors in sequence, noting their positions with labels or photographs. Install the 1336T-GT1-SP34B replacement board, reconnect all cables, and verify that the firmware revision on the new board matches the original — if not, a firmware update may be required before parameter restore.

After power-up, restore saved parameters, verify motor nameplate data entries, and perform a no-load test run before reconnecting the driven load. Confirm that all fault codes are cleared and that speed reference, enable, and fault relay outputs are functioning correctly. This workflow is applicable whether you are replacing a failed board in an emergency shutdown scenario or performing a planned swap during a scheduled maintenance outage.

For legacy 1336 PLUS systems approaching end-of-support, KNMKS maintains long-term inventory of critical spare boards including the 1336T-GT1-SP34B, enabling customers to extend system life without committing to a full drive replacement program. This approach is particularly cost-effective for low-duty-cycle applications where drive replacement ROI is difficult to justify.

Spare Parts Support FAQ

Q1: Is the 1336T-GT1-SP34B compatible with all 1336 PLUS drive frame sizes?
The 1336T-GT1-SP34B is designed for the 1336 PLUS series and is compatible with the drive frames and firmware revisions it was originally paired with. Before installation, confirm the firmware revision on the replacement board matches your existing drive configuration. KNMKS technical support can assist with compatibility verification based on your drive nameplate data.

Q2: What testing is performed before shipment?
Each 1336T-GT1-SP34B unit undergoes functional power-on verification and visual inspection for component integrity, solder joint quality, and connector condition. Units that do not pass inspection are not shipped. A support terms confirmed by quotation cover defects in materials and workmanship from the date of delivery.

Q3: How should I manage spare parts inventory for aging 1336 PLUS systems?
For facilities operating three or more 1336 PLUS drives, maintaining at least one 1336T-GT1-SP34B control board as a critical spare is recommended. Drives in high-cycle or high-ambient-temperature environments should be prioritized. KNMKS supports blanket order arrangements and reserved stock programs for customers with multi-site maintenance requirements.

Q4: Can KNMKS supply the 1336T-GT1-SP34B on an ongoing basis for long-term maintenance contracts?
Yes. KNMKS maintains long-term supply capability for 1336 PLUS series spare parts, including the 1336T-GT1-SP34B and associated compatible SKUs such as 1336T-LM1EN. We support customers managing legacy system life extension programs with consistent lead times, documented sourcing, and full traceability. Contact admin@knmks.com for volume pricing and supply continuity agreements.

© 2026 KNMKS. All rights reserved.
Original Source: https://knmks.com
Contact: admin@knmks.com | +86 18359268345

Product Identification

Brand / Ecosystem

Allen-Bradley
Allen-Bradley

Model / Series

1336T-GT1-SP34B 1336T-LM1EN 74103-015-52A 74101-954-52C

Product Family

PLCs & Controllers

Availability Status

Available on request after model and quantity confirmation

Inquiry Type

B2B RFQ, replacement inquiry and project spare-part request

Pre-Quote Check

Exact SKU, brand, series, quantity, nameplate photos and destination country are checked before quotation

Specification & Inquiry Focus

Control platform

PLC, PAC and modular controllers

Common needs

CPU, rack, power and I/O expansion

Project support

Replacement, cabinet build and maintenance

Inquiry Support

• Model cross-checking before quotation
• CPU, power, rack and expansion module matching
• Support for replacement and project inquiry

What to Send Us

• Brand and exact model number: Allen-Bradley 1336T-GT1-SP34B 1336T-LM1EN 74103-015-52A 74101-954-52C
• Quantity and required delivery time
• Application, replacement requirement or nameplate photo
• Destination country and shipping preference