Product Description
**Milwaukee parts change not only by model# but also by serial number. To look up your tools parts break down on Milwaukee's website please click here:
Milwaukee Switch Trigger
Model Number: 45-72-0088
The Milwaukee 45-72-0088 Switch Trigger is a genuine OEM replacement part designed for the Milwaukee 2646-20 (serial code E98A) M18 Cordless 2-Speed Grease Gun, plus the 2646-21CT and 2646-22CT kit configurations of the same tool. Identified as Figure 13 on Milwaukee service bulletin 54-06-2630 (October 2022), the switch trigger is the operator-facing trigger that the user pulls to actuate the grease gun and dispense grease through the hose to the lubrication fitting. The trigger works in conjunction with the Lock On-Off Shuttle (Milwaukee 42-42-0037), Spring (Milwaukee 40-50-0890, two required per tool), plate springs, and the internal switch and electronic controls to deliver responsive, variable-pressure grease dispensing in both of the tool's selectable speeds.
A worn, broken, cracked, sticking, or seized switch trigger prevents the operator from actuating the grease gun reliably, makes the trigger pull feel inconsistent, or causes the trigger to fail to return to the rest position after release. These symptoms make the grease gun frustrating to use and can lead to inconsistent grease delivery, which on a tool used for routine lubrication of equipment, vehicle, and industrial machinery grease fittings can result in under-greased or over-greased service points. Replacing the trigger with this OEM service part restores correct trigger pull and reliable actuation. The 45-72-0088 commonly wears at the same rate as the other components in the trigger assembly area (the Lock On-Off Shuttle and the small precision springs), so when one component is being serviced it is good practice to inspect the others at the same time and replace any that show similar wear. Because Milwaukee Tool specifies replacement parts by both catalog number and serial number, always verify your tool's serial number against the official Milwaukee 2646-20 service parts diagram before ordering. Verify by serial number using Milwaukee's online parts lookup before ordering to confirm correct fitment.
Features
- Genuine Milwaukee OEM replacement, direct factory part for the 45-72-0088 reference
- Designed for the Milwaukee 2646-20 (E98A) M18 Cordless 2-Speed Grease Gun
- Also fits the matching 2646-21CT and 2646-22CT kit configurations
- Operator-facing switch trigger for actuating the grease gun
- Works with the Lock On-Off Shuttle (42-42-0037), Spring (40-50-0890, qty 2), and internal switch electronics
- Documented in Milwaukee service bulletin 54-06-2630 (October 2022), Figure 13
- Critical control for reliable, variable-pressure grease dispensing
- Manufactured to Milwaukee factory tolerances and material specifications
- Direct-fit replacement, no modification required for installation
- Restores correct trigger pull and reliable actuation after wear, breakage, or seizure
Specifications
- Manufacturer: Milwaukee Tool
- Part Number: 45-72-0088
- Official Description: Switch Trigger
- Component Type: Cordless Grease Gun Operator Trigger
- Confirmed Compatible Models: Milwaukee 2646-20 (E98A) M18 Cordless 2-Speed Grease Gun, 2646-21CT and 2646-22CT kit configurations
- Service Bulletin Reference: 54-06-2630 (October 2022), Figure 13
- Companion Service Parts: Milwaukee 42-42-0037 Lock On-Off Shuttle, Milwaukee 40-50-0890 Spring (qty 2 per tool) - all sold separately
- Quantity: Sold individually, 1 trigger per order
- Part Type: OEM Service Replacement Part
Includes
- (1) Milwaukee 45-72-0088 Switch Trigger
- Note: Companion trigger assembly service parts (Milwaukee 42-42-0037 Lock On-Off Shuttle, Milwaukee 40-50-0890 Spring qty 2) are NOT included and sold separately. Recommended for inspection at the same time during a full trigger assembly service
- Note: Verify your tool's catalog number (2646-20, 2646-21CT, or 2646-22CT) and serial number against the official Milwaukee parts diagram before ordering
