The cold planer is equipped with a first and second stage conveyor. The first stage removes material directly from the cutter housing and carries material to the second stage. The second stage loads the material into the truck. The second stage position can be adjusted by the operator to direct the loading of the material.
The conveyors are typically driven in the forward direction. However, both the first and second stage can be driven in reverse independently.
The PM600 Cold Planer is equipped with an optional hydraulically controlled folding second stage conveyor. The folding feature is controlled with pairs of keypad push buttons on the upper and lower front keypads. The feature to fold and unfold the Conveyor is disabled when the second stage conveyor forward or reverse drive is ON.
The upper operator stations are equipped with joysticks and the lower front keypad operator stations are equipped with push buttons for controlling the position of the second stage conveyor. When the joystick is moved forward/up the conveyor lowers. When the joystick is moved back/down the conveyor raises. The up/down control is on/off and the left/right control is proportional when commanded from the joysticks and on/off when commanded from the lower front keypads.
The cold planer is equipped with a conveyor swing unlock feature to aid in transporting the machine. When unlocked, the second stage conveyor will swing left and right freely. The unlock handle for this feature is located in a remote area that is covered.
Because of this remote location the operator may not always know what position the handle is in. The hydraulic system will be disabled when in the unlock position to prevent machine movement from causing the conveyor to swing. When in the normal operate position, full hydraulic system capability will be restored.
The Cold Planer will feature three different engine speeds: 800 RPM, 1100 RPM, and 1600 RPM when the rotor is OFF (non-milling mode) . On engine start-up, the engine will operate at 800 RPM. The control system will automatically increase engine speed to 1100 RPM when any machine operation is selected. The operator may press the "High Idle" push button to increase engine speed to 1600 RPM.
When the rotor is ON, there will be three high engine speeds that can be selected: 1600 RPM, 1750 RPM, and 1900 RPM. These speeds are selected with a push button on the upper left control panel and upper right control panel. The control panels feature indicator LEDs to identify which rotor engine speed is selected.
The tier"4f" PM600 is equipped with a DPF that requires periodic regeneration for cleaning. This regeneration can be forced or inhibited (depending on other conditions) using two "soft" switches within the silver information displays.
This feature will be seamless to the operator of the machine. The operator will have a button on the upper control panel that will allow the regeneration to be disabled (for a length of time). Due to the typical Cold Planer duty cycle, most regeneration is expected to occur during high idle speed operation.
The Cold Planer is equipped with optional left and right hydraulically controlled Grade Control skis. These skis provide an alternative to side plates for measuring grade with the Grade & Slope system. The left and right skis can be individually lowered and raised with single keypad push buttons on the upper and lower front keypads.
The All Legs Raise and All Legs Lower features are useful to the operator because this feature combines several functions into one operator input. Instead of pressing several buttons, the operator can use one single button and the control system does the work to raise and lower the machine. Under normal conditions the All Raise/Lower button will extend or retract all four legs at the same velocity. When the machine is raised up to the pre-service height level, the leg heights will then equalize. This equal height is useful for many reasons. The feature can be used for transporting the machine, service, and setting up the scratch point at the beginning of the cut.
The Cold Planer has four hydraulically adjustable legs, one on each corner of the machine. These legs control the height and angle of the machine. The leg heights can be manually adjusted by the operator or automatically adjusted by the grade & slope system.
The legs automatically stop extending when
The four work light banks are powered with four separate electrical relays. The beacon lights are all powered with a single electrical relay. The operator can turn all work lights and the beacon lights ON and OFF from the top control panels. The operator can also turn each bank of work lights ON and OFF individually and the beacon lights ON and OFF via the machine display.
The Cold Planer is equipped with an optional truck motion lighting system. One red and one green LED light panel is mounted on the forward facing side of both rear-view mirrors.
The lights provide indication to the truck being loaded:
- Green = Increase Speed
- Red (Flashing) = Reduce Speed
The Cold Planer is equipped with Action Lamps on the upper left and upper right control panels. The Cold Planer is also equipped with an Action Alarm on the center cabinet. The Action Lamps and Action Alarm turn on and off based on the events and diagnostics that are currently active on the Upper Fixed 1 display.
The Cold Planer has an Engine ECM, Aftertreatment ECM, and three main machine ECMs, Machine, Transmission, and Steering which also communicate over the data link with 3 CAN I/O modules and 6 J1939 AVSpare 16-button keypads. Communication is monitored between these components on the data links.
The Cold Planer is equipped with six Emergency Stop buttons at multiple locations on the machine. The purpose of the Emergency Stop is to provide a means for an operator to stop the machine and shut down the engine if a dangerous situation occurs.
The hydraulic filter is equipped with a bypass switch to determine if the filter is plugged and bypassing oil around the filter.
When one of the monitored fuses is blown or removed, a diagnostic becomes active on the display, indicating that the corresponding fuse has faulted. When the fuse is replaced, the fault is cleared.
The display will show the hydraulic oil temperature in either °C or °F. Warnings will occur when the temperature exceeds certain thresholds for a specified period.
The cold planer is equipped with a 4 position ignition key switch.
The key switch has the following states:
- Engine Crank
- Delayed Engine Shutdown Override
The ON position will turn on all ECMs and electronic components. The main power relay will be energized. The engine crank position will engage the engine starter and will incorporate the corporate strategy for the controls, warnings, and diagnostics. The delayed engine shutdown override will cancel the delayed engine shutdown feature and immediately shut down the engine.
The Cold Planer is equipped with several horn buttons at multiple locations on the machine. Each of the six control panels is equipped with a horn button. The horn buttons on the top control panels activate loud front facing horns for communicating with the truck driver. The horn buttons on the lower control panels activate quieter horns located in the top operator station and are for communicating with the top operator only.
The machine idle status communicates whether the machine is actively working or at rest.
- "Not Idle" - the machine is actively working
- "Idle" - the machine is not considered to be doing work
During milling operations, the Cold Planer typically fills a truck with the material being milled. When the truck becomes full, the cold planer must be stopped to allow time for the full truck to be exchanged with an empty one. This feature simplifies that process by bringing the machine to a stop and shutting down milling functions with the press of a single button. Pressing the same button again resumes all the milling functions.
When the hydraulic oil level is low, an event will be active and logged. The level status of the switch will be available in ET.
The Product ID is a number that is used to let the ECM software know what type of machine the Product ID is installed on. The Machine Control ECM will be the only ECM that is able to program the Product ID. The Machine ECM will send out the Product ID information when requested. The Transmission ECM and the Steering ECM will read the Product ID from the J1939 data link and request the Product ID from the Machine ECM until Transmission ECM and Steering ECM receive a response when the keyswitch turns on.
The Cold Planer features an electric motor driven hydraulic pump that can provide flow to the auxiliary system and park brakes in the event of a dead engine. This feature enables the machine to be lifted out of a cut, steer the tracks, disengage the park brakes, etc. with the engine off. This feature is turned on and off from the machine display.
When the Tow Mode parking brake is enabled in the display, the electric motor driven hydraulic pump will release the parking brakes. When the Tow Mode system is enabled in the display, select machine functions will be driven by the electric motor driven hydraulic pump. These features can only be enabled when the engine is not running.
The Cold Planer is equipped with an optional vacuum dust control system. This system features a fan that is driven by a hydraulic motor. This fan pulls air and smoke from the cutter housing and is ejected near the end of the second stage conveyor. This system minimizes the exposure of harmful fumes to the cold planer crew.
The Cold Planer is equipped with an optional water tank fill pump, fuel tank fill pump and high-pressure wash down system. These systems all incorporate a simple ON/OFF control.
If the pump discharge pressures drop below a certain level for a specified period, a level 3 warning will become active instructing the operator to shut down the machine and repair the issue.
The Cold Planers propel system features two electronically controlled variable displacement pumps providing flow to four electronically controlled variable displacement motors. One pump provides flow to the front left and rear right motors and the other pump provides flow to the front right and rear left motors.
The cold planer has a vertically adjustable moldboard on the rear of the rotor chamber. The purpose of the moldboard is to enclose the rotor chamber and scrape the milled surface to minimize the amount of milled material left behind.
When the moldboard is scraping the surface the operator is able to adjust the amount of down pressure that is being applied. The amount of pressure is a trade-off between cleaning the surface and wear of the moldboard. Increasing down pressure also reduces the amount of propel system traction.
The Cold Planer is equipped with a large rotatable rotor drum with numerous carbide teeth. The rotor is mated to the engine via a planetary gear set, belt, and clutch. The clutch is the primary means for engaging and disengaging the rotor. The belt is equipped with a hydraulic tensioner that must also be on to engage the rotor drive.
The moldboard is attached to the rotor service door. The moldboard slides up and down relative to the rotor service door. The rotor service door can be opened for servicing the rotor. When open, greatly increases the accessibility and serviceability of the rotor.
The rotor service door can be opened for servicing the rotor. When open, the door greatly increases the access and serviceability of the rotor. When open, several machine functions are disabled to minimize the risk to the individual servicing the machine.
As the machine moves forward during milling, the Side Plates ride (float) on the surface. The Side Plates move up and down with the surface and the cylinders move correspondingly. The grade control system monitors the cylinder movements and adjusts the machine legs to maintain the desired grade.
The front steering system enables the machine operator to control the direction of machine travel and thus the area to be milled. Precise control is needed to enable accurate match cutting and following of desired cutting path.
The rear steering system enables the machine operator to maneuver the machine in different situations and around various objects. Rear steering is typically performed with limited regularity.
Cold planers have four different steering modes:
- Front Steer
- Rear Steer
Only one steering mode can be active at a time. The different steering modes are used to achieve the optimum front and rear steering angle combination for the corresponding machine operating condition.
Cold planers have independently steerable front and rear tracks. Synchronization of the relative track angles front to rear is desired for various machine operating conditions. Automatically controlling this synchronization simplifies the operation and improves the overall maneuverability of the machine.
To optimize track pad life and smoothness of operation the cold planer utilizes a “true track” steering system. This system changes the angle of right tracks relative to the left depending on the machine operating conditions. This machine control is achieved via an adjustable hydraulic toe cylinder (in place of a fixed tie rod).
In-cylinder position sensors are used in the steering and toe cylinders to determine the current position of the front and rear tracks. The relative track angles are adjusted to achieve either parallel or Ackermann type left to right track alignment on both the front and rear tracks. The alignment is determined based on which steering mode is active and the relative angles of the fronts to the rear.
The cold planer is equipped with a large rotatable rotor drum with numerous carbide teeth. The teeth must be lubricated and cooled with water during the milling process to minimize dust and tooth wear. The water spray pump is driven hydraulically and is proportional.