the depth adjustment lever is super stiff and hard to move, feels like it's going to break.

Diagnosis

The stiffness in the depth adjustment lever on the Makita XSR01Z is typically caused by the accumulation of "compressed sawdust paste." Because this is a rear-handle saw, the depth adjustment mechanism is positioned in a way that allows fine particulate matter and sticky resins from treated lumber to migrate directly into the rack-and-pinion assembly. Over time, these particles mix with the factory grease, creating a thick, abrasive sludge that increases friction and puts immense mechanical stress on the plastic lever handle. When you attempt to move the lever, you are fighting against this solidified debris. If the lever feels like it is about to snap, it is likely because the pinion gear is binding against the metal rack, and the force is being transferred to the plastic housing of the adjustment knob rather than the gear itself. You can confirm this by looking closely at the rack; if you see a dark, crusty buildup of grey or brown material in the teeth of the gear, the mechanism is fouled. If the lever moves freely when the saw is unplugged/battery removed but resists during operation, the issue is purely mechanical friction within the adjustment track.

How to Fix It

To restore smooth operation, you must perform a deep clean of the depth adjustment track and re-lubricate the contact points. Follow these exact steps:

1. Remove the 36V battery pack immediately to prevent accidental startup.
2. Set the saw to its maximum depth setting to fully expose the rack-and-pinion mechanism and the guide rails.
3. Use a high-pressure canister of compressed air or an industrial vacuum with a narrow crevice tool to blow out the loose sawdust from the adjustment slot. Focus specifically on the area where the pinion gear meets the metal rack.
4. Apply a small amount of citrus-based degreaser or electronic contact cleaner to a stiff nylon brush. Scrub the teeth of the metal rack and the pinion gear thoroughly until all resinous buildup is dissolved.
5. Wipe the area clean with a lint-free microfiber cloth. Ensure no residue remains, as leftover degreaser can strip the remaining necessary lubrication.
6. Apply a dry-film PTFE (Teflon) lubricant or a high-quality dry silicone spray to the rack. Avoid using heavy wet greases or WD-40, as these act as "dust magnets" and will cause the problem to return much faster.
7. Cycle the depth adjustment lever up and down 10-15 times to distribute the lubricant evenly across the gear teeth.

If That Didn't Work

• Check for bent rack teeth. If the saw has been dropped or suffered a heavy impact, the metal rack may have a slight bend. Inspect the rack for any burrs or shifted metal. If found, use a small needle file to carefully smooth out the burr, then re-lubricate.
• Inspect the tension spring. There is a return spring mechanism that assists the depth adjustment. If this spring has become displaced or clogged with debris, it can create an uneven pivot point, making the lever feel stiff. Use a pick tool to clear any debris from the spring housing.
• Evaluate the lever pivot bolt. If the bolt securing the adjustment lever has vibrated loose or become over-tightened during a previous service, it will create binding. Use a hex key to ensure the pivot bolt is snug but not crushing the plastic bushing.
• Check for blade guard interference. Ensure the lower blade guard is not bent or rubbing against the depth adjustment track. If the guard is slightly warped, it can put lateral pressure on the rack, making the lever feel significantly harder to move.

Heads Up

• Never use heavy automotive grease on the depth rack; the thick consistency attracts sawdust, which turns into an abrasive grinding paste that will eventually wear down the pinion gear.
• Perform a "blow-out" of the adjustment mechanism every 20 hours of heavy use using compressed air to prevent buildup.
• If you are cutting pressure-treated lumber, the resins are significantly more aggressive; increase your cleaning frequency to avoid permanent gear binding.
• Avoid forcing the lever if it hits a hard stop; the XSR01Z uses high-impact plastics, but the internal gear teeth can still shear under extreme manual pressure.