John Deere Deck Service MoJack Lift (Setup)

To set up a MoJack lift for a John Deere mower, first confirm that the exact lift model is approved for your mower’s weight, front-tire size, and lift-point layout. Assemble and inspect it as its manual directs, position the mower on firm, level ground, secure the tires, and engage every required mechanical safety lock before servicing the deck.

Deck work is easier when the mower is held steady at a useful height, but a lift is safe only when the mower and lift are a verified match. Model names alone are not enough: John Deere tractors can differ in weight, tire size, and approved lifting points, while MoJack models do not all share the same capacity or setup.

I use the two manuals as the starting point, then check the lift’s label and the mower’s actual configuration. That prevents a common mistake: treating a lift that fits one tractor as suitable for every tractor in the same brand family.

Equipment Compatibility, Setup & Safety Prep

Compatibility means the lift is approved for the specific mower and lifting arrangement, not merely that the tires appear to fit. Before assembly or lifting, compare the mower’s service weight, front-tire dimensions, and designated lift points with the lift manual and compatibility information. If any required detail is unclear, pause and confirm it with the manufacturers.

Start with these checks:

“Service weight” is the mower’s weight as specified for the relevant service configuration. Do not guess from a similar-looking model or assume the weight of the mower and deck can be ignored. If the manual gives more than one weight, use the figure that applies to the mower configuration you plan to lift.

Match the mower to the lift before assembly

A compatibility chart is a fit check, not a suggestion. Compare the exact mower model, tire dimensions, and wheel arrangement listed in the mower manual with the approved combinations in the MoJack documentation. If your tire size, wheel span, or model is not listed, do not assume a close match is safe.

Also check the lift points. The mower manual controls where the machine may be raised; the lift manual controls how its arms or contact points are arranged. Both conditions must be met at the same time. Never use the deck as a lifting point, even if the lift seems to clear it.

Prepare the mower and work area

Choose firm, level concrete. A slope or soft surface can let the mower roll or shift as it rises. Park the mower, lower the deck, disengage the PTO, set the parking brake, stop the engine, remove the key, and allow hot parts to cool before positioning the lift.

Keep bystanders away from the work area. Wear eye protection and sturdy footwear, and keep hands clear of moving lift parts and pinch points. Chock the mower’s rear wheels as directed for the setup. If you cannot confirm that the lift is stable and correctly positioned, lower it and reassess rather than trying to correct the setup while raised.

Deck-Service Access and Lift Operation

A mower lift raises the front of the tractor so you can reach the underside of the deck, but it does not make the machine safe by itself. The tires, lift points, restraints, floor, and mechanical locks all work together. Raise only as much as needed for the job, and do not put any part of your body beneath an elevated mower unless the lift is locked and stable.

Position and secure the mower

Assemble the lift exactly as its manual shows. Inspect the parts and confirm that the lift is set for the approved mower and tire arrangement. Center the mower with the lift, line up the lift’s contact points with the mower’s designated lifting points, and make sure the front tires seat fully in the cradles.

Fit the supplied tire restraints as instructed. They should hold the tires in place without being routed or tightened in a way the manual prohibits. Check that the rear wheels are chocked and that the mower is not angled or visibly off-center.

Before raising, look around the front tires and deck area. Confirm that the lift will not catch or press against the deck, steering parts, hoses, or other components as it moves. If something touches unexpectedly, stop and lower the mower before changing the setup.

Raise slowly and engage the locks

Operate the lift in small, controlled steps. Watch both front tires, the restraints, and the mower’s position as it rises. Stop at once if a tire shifts, the mower moves sideways, the lift tilts, or any part of the lift contacts the deck or another component.

Stop at the height needed for deck service. Engage the mechanical safety lock or locks in the way the lift manual specifies, then verify that they are fully seated and that the assembly remains stable. Do not rely on hydraulic pressure alone, and do not work beneath the mower if a lock cannot be engaged.

A practical setup check is to pause before service and confirm, from outside the pinch zones, that the mower remains centered, the tires are restrained, the rear wheels are chocked, and the lock is holding. If anything looks uncertain, lower the mower and correct the cause.

Practical fit scenarios

These examples are decision guides, not claims about a particular mower or lift model:

• Tire size is absent from the lift chart: Do not proceed based on visual similarity. Check the exact lift model’s manual or ask the manufacturer to confirm compatibility.
• The lift reaches its contact points, but they do not align with the mower’s approved points: Stop. Do not lift from the deck or improvise a contact point.
• A tire moves as the mower rises: Stop the lift. Lower the mower, review centering and restraint placement, and restart only if the setup matches both manuals.
• The mower is raised but a safety lock will not engage: Lower it. The mower is not ready for service while supported only by the lift’s hydraulic system.

These checks are especially useful when a mower looks similar to a previous one but has different tires or a different front-end layout. Small differences can change whether the lift is approved.

Lift Inspection and Post-Service Checks

Inspection means checking the lift before use and confirming the mower remains supported during the job. Look for damage, loose or missing parts, worn restraints, leaks, or other issues identified in the lift manual. Do not use a lift with a problem that could affect its stability or operation; contact the manufacturer for the correct remedy.

Before and during deck service

Follow the lift manual’s inspection steps, including any checks for fasteners, moving parts, hydraulic components, and safety locks. Do not substitute a visual check for a required test. If the lift has been damaged, altered, or stored in a way that may have affected it, resolve the concern before raising a mower.

Keep tools and parts organized so they cannot fall or interfere with the lift. Avoid leaning or pushing against the mower in a way that could shift it. If the mower moves or the lift becomes unstable, stop work and clear the area around the machine; do not reach under it to adjust a restraint or lock.

Lower the mower in a controlled way

When the service is complete, remove tools and loose parts from the deck and the area around the lift. Follow the lift manual’s procedure for releasing the mechanical lock. Lower the mower slowly, watching for tire movement, contact, or shifting as the front wheels return to the ground.

Keep hands and feet clear while lowering. Once the mower is fully grounded and stable, remove the tire restraints and rear-wheel chocks as directed. Do not remove them while the mower is still elevated or settling onto the ground.

Storage and Seasonal Care

Storage care helps keep the lift ready for its next use; it does not replace inspection before lifting. After the lift is fully lowered, clean it as its manual allows and store it in a dry, protected place. Follow the manufacturer’s instructions for hydraulic care, lubrication, and any storage position or maintenance schedule.

Keep the lift manual and the mower’s lifting instructions together or easy to find. Record the mower model, tire size, and the lift model you verified. That note can save time next season, but recheck the setup if the tires, mower, lift, or configuration has changed.

Before the first seasonal use, inspect the lift again. Check that its parts and restraints are present, the lift operates as expected, and the mechanical lock engages correctly. If you see a leak, damage, or a lock that does not work as intended, do not put the lift into service until the issue is addressed.

Frequently Asked Questions

These answers cover the checks that most often determine whether a mower can be raised safely. The exact lift manual and mower manual remain the authority for compatibility, assembly, operating steps, and service limits. If their instructions differ from a general guide, follow the instructions for your exact equipment and contact the manufacturer when the fit is unclear.

Can any MoJack lift raise a John Deere mower?
No. Compatibility depends on the exact lift model, mower model, mower weight, front-tire size, and lift-point geometry. Check the lift’s compatibility information and both manuals before setup.

How do I know whether the lift has enough capacity?
Read the capacity on the lift’s identification label, then confirm the mower’s service weight in its documentation. The rated capacity must cover the load in the intended lifting configuration.

Can I lift the mower by its deck?
No. Use only the lift points designated in the mower manual. The mower deck is not an approved lifting or support point.

Do I need to engage the safety lock?
Yes. Engage every mechanical lock required by the lift manual before service. Hydraulic pressure alone is not a safe support for working on an elevated mower.

What if my front-tire size is not listed?
Do not assume the lift will fit. Check the exact lift manual or contact the lift manufacturer to confirm whether your tire size and mower configuration are approved.

Can I set up the lift on a driveway?
Only if the surface is firm and level, and the lift manual permits the setup. A slope or soft ground can allow the mower to roll or shift.

Should I chock the rear wheels?
Yes, follow the lift manual’s instructions for chocking the mower’s rear wheels. Keep the chocks in place until the mower is fully lowered and grounded.

What should I do if a tire shifts while raising?
Stop immediately and lower the mower. Recheck centering, cradle fit, restraints, and compatibility before attempting to lift again.

How high should I raise the mower?
Raise it only to the height needed for the service task, within the lift manual’s instructions. Engage the mechanical lock at the selected height before working.

When can I remove the restraints and chocks?
After service, lower the mower slowly. Remove restraints and chocks only when the mower is fully grounded and stable, following the lift manual’s sequence.

(This article was written by one of our staff writers, Harrison Croft. Visit our Meet the Team page.)