#2020 mack garbage truck series

Again, make sure the engine is off and there are no rotating components. If all of the PTO mechanical components are accounted for and properly installed, then is time to focus on the electrical side (see Figure 2).Įlectrical troubleshooting follows the same divide and conquer method. Most PTOs have an indicator light mounted on a bracket in the cab and be sure to check to make sure it is connected and functional. Determine if the input gear is meshing with the transmission gear. If it is air shift, confirm that there is a minimum of 65 psi of air pressure. If it is an electric shift, make sure the wires are connected. If it is a cable shift, confirm that the shift lever moves enough to properly engage the gears.

Are all the fasteners in place and tight? Verify that the extend shaft is installed in the housing. Do the splines match? Are the splines engaged? Check to see if the woodruff key is missing from the output shaft. Look for something or anything that could be missing. You may find that the problem is not even with the PTO to begin with. Identify what is not working for example, is the auxiliary equipment not rotating, not building pressure, leaking or is there simply just no flow? Start at the end of the system and work your way back toward the PTO. This works for mechanical, electrical or hydraulic debugging: a technique known as the divide and conquer method. The first course of action is to study the system from start to finish. Adhere to all safety warnings and precautions. Chock the wheels, remove the keys and be sure to put them in a safe place before applying lockout tags. Working near rotating parts is extremely dangerous so be sure to use safe practices before beginning any work underneath the vehicle. Although it may seem obvious, make sure the vehicle engine is off and the equipment has had time to cool down before working around or under any vehicle. Study the system drawings or schematics and think through the system in order to decide on the best course of action. Remember to contact your distributor or call the PTO manufacturer to help with questions or troubleshoot if you need any assistance.įocus on the mechanical and electrical aspect as they relate to and interact with the hydraulics and pneumatics circuits-essentially look at the system as a whole (see Figure 1). One last major area deals with hydraulics and pneumatics and their relationship to electrical and mechanical functionality these areas are touched on last.

Typically, there should not be any new parts left in the box or on the shop floor after the installation is completed and it is vital that the installer reads the instructions. Electrical issues may include wrong or omitted parts, bad connections and/or poor grounding. Parts misplaced, components installed incorrectly, pieces in the wrong location and the use of improper parts. The mechanical aspect has a few key areas of concern. The two main troubleshooting areas are mechanical and electrical. Troubleshooting a PTO’s performance, or that of any other mobile power system, requires focus, planning and system knowledge it is essential to keep that in mind as you approach the process. These articles cover the important and oftentimes forgotten topics mechanics need to be familiar with in order to get the most out of their power take-off (PTO).

#2020 mack garbage truck series

This article is third in a series to help owners and end users plan the selection, installation and maintenance of vehicles equipped with power take-offs, extended shafts and hydraulic equipment related to mobile power. If the PTO is not working as planned, simply step back and review the problem. Troubleshooting is a bit of an art and requires patience, specific product knowledge and good tools.