Tronair JP30, Operation & Service Manual, Page: 15 / 83

Models: JP30, JP30L
Electric Towbarless Tug
07/2015 | Rev. 10 Page | 11
10.2
LUBRICATION (continued)
4. Repack the steering shaft roller bearings with wheel bearing grease on an annual basis.
5. Repack all three steering axle wheel bearings with wheel bearing grease on an annual basis. Clean bearings and remove
all old grease using solvent. Do not mix greases having different bases.
6. Check the oil in the steering gearbox annually. Add SAE 90W, if necessary.
7. Check the oil level in the hydraulic reservoir every day during preoperational check. Add hydraulic oil, if necessary. Use
an AW 46 hydraulic oil. Make sure the cradle cylinders are fully retracted prior to adding fluid. Fluid level should be at
least one and half inches down from the top.
8. Check the transaxle fluid level every month. Remove the level screw which faces forward and is near the center line of the
axle. If oil is not to this level, add SAE 90W at the filler plug on top of the transaxle. The transaxle holds seven (7) pints.
9. The motor bearings and the drive wheel bearings are sealed and require no lubrication.
10. The steering shaft bearing and the accelerator control do not require lubrication.
10.3
NYLON STRAPS
1. Preshift Inspection Of Straps: Winch, strut and safety straps should be inspected during the daily preshift inspection
process.
WARNING
These straps are the primary means of securing the aircraft to the JETporter. Failure of these components
could result in death or serious injury and/or significant damage to the aircraft.
2.
Worn/Damaged Straps: Discontinue use of any strap that shows signs of wear or damage such as torn or frayed edges,
damaged “D” rings or hooks, loose or broken stitching, signs of chemical damage or holes in webbing of strap. See
attached sheet for examples of unserviceable straps.
3. Periodic Strap Inspection: Strut and winch straps are degraded in tension capacity by normal wear, age and exposure
to the elements. Operators should inspect straps daily during normal preshift inspection.
4. Routine Strap Replacement: Strut and winch straps should be associated with a specific tug and tracked for age. Straps
should be routinely replaced annually or after 150 hours of use, whichever occurs first. Replacement is mandatory if
inspection shows any wear or damage that would lower maximum capacity of the straps or fittings.
5. Non-Routine Strap Replacement: Enclosure (1) is provided as a guideline for inspecting straps. Straps provide the
primary securing device for your aircraft and as such should be of primary importance in the maintenance cycle.
10.4
COMPONENT WEAR
1. The parking brake on the rear of the motor disk will wear very slowly. If the dynamic motor braking is utilized, the parking
brake will last for many years.
2. Tires should be replaced when the tread depth is less than ¼ in.
3.
Motor Brushes : Motor brushes will wear very slowly; however, they should be checked at least once a year.
10.5
REPAIRS
2. Repairs needed on your JETporter should be performed by competent repair personnel.
3. The batteries in your JETporter must be replaced with like batteries. The charger has been designed to operate with this
size battery. Do not substitute a higher or lower Amp/hour rated battery. All batteries should be replaced at the same time.
4. Do not attempt to repair the electronic controller. Contact Tronair for proper repair procedures.
5. Contact Tronair before making substitutions of any parts.