1. Mainframe
2. Powerpack
3. Wheel Assemblies
4. Fuel Tank
5. Hydraulic Oil Tanks
6. Water Tank
7. Cutter Assembly
8. Consoles and Controls
9. Auxiliary Cutter Assembly
Mainframe
The mainframe is an all-welded, heavy plate assembly with box-type structural support beams. Decking is grid plate with grated inspection panels. The mainframe rides on 3 wheels, 2 on the left side and one on the right side. A hydraulic cylinder inside the right leg controls the machine slope (tilt).
Powerpack
A naturally aspirated four-cylinder AVSpare diesel engine supplies the power for the machine. A pump drive gearbox mounted on the rear (left side) of the engine transmits the power from the engine to a belt drive assembly and to one or two hydraulic pumps.
- 1. The belt drive turns the side-mounted cutter and accessory pump.
- 2. The wheel drive pump supplies the pressurized hydraulic oil required to turn the two wheel drive motors.
- 3. The second pump, if installed, powers the optional auxiliary cutter (front-mounted cutter).
- 2. The wheel drive pump supplies the pressurized hydraulic oil required to turn the two wheel drive motors.
The engine is protected against dust and other foreign material by a dry type induction air cleaner. The air cleaner consists of a precleaner, which separates most of the dust from the air before it reaches the cleaner elements; a dust ejection valve, which ejects the dust from the air cleaner body; a main element and a safety element. The main element can be cleaned and reused if it is not damaged (see the Service Manual for cleaning procedures).
The hydraulic oil is cooled by an oil cooler mounted in front of the engine radiator. Cooling air is drawn through the oil cooler and then through the radiator by the engine fan.
Wheel Assemblies
LEFT FRONT WHEEL ASSEMBLY
LEFT REAR WHEEL ASSEMBLY
Each left wheel assembly consists of a wheel yoke, a hydraulic motor, a planetary gear reducer, a steering cylinder and a wheel with a solid rubber tire. The left front wheel assembly also has a steering arm and a hydraulic brake.
The left wheel yokes fit into holes at the left corners of the mainframe and are held in place by top caps. The wheel yokes are free to pivot within the mainframe.
Bolted to each left wheel yoke is a planetary gear reducer that has a wheel bolted to the outer side of it. Mounted on the inner side of each gear reducer is a hydraulic motor that turns the gear reducer and attached wheel. (See page 2-14 for a description of the wheel drive hydraulic system.) A hydraulic brake is located between the left front wheel motor and the gear reducer. Hydraulic oil from the accessory system is used to overcome the force of springs in the brake and thereby disengage the brake. The brake will engage anytime the emergency brake control is moved to "On" or hydraulic pressure in the brake falls below 190 to 200 psi (1310 to 1379 kPa).
The steering cylinders are each connected to the mainframe and to one of the left wheel yokes. When the cylinder rod extends or retracts, it pivots the wheel yoke and attached wheel. (See page 2-21 for a description of the steering hydraulic system.) A steering arm, connected between the two front wheel yokes, causes the right front wheel yoke and wheel to turn in unison with the left front wheel and yoke.
The right front wheel assembly is unpowered but includes an elevation cylinder. The leg yoke fits inside a leg barrel located at the right front corner of the machine and the elvation cylinder is installed inside the leg barrel and leg yoke. When the cylinder extends or retracts in response to the machine tilt control, the right front corner of the mainframe is raised or lowered. This changes the tilt (cross slope) of the mainframe and cutter. (See page 2-23 for a description of the machine tilt hydraulic system).
Fuel Tank
Two sight gauges provide a continuous indication of the fuel level in the 56-gallon (212 L) tank. A strainer located in the fillpipe removes any large particles from fuel being added to the tank. To help keep the fuel clean, a breather removes large particles from air that enters the tank when the tank "breathes" because of machine and/or atmospheric temperature changes. Water and other impurities that settle to the bottom of the tank can be drained off by opening the shutoff valve in the bottom of the tank.
Hydraulic Oil Tanks
There are two hydraulic oil tanks. The main tank stores 47 gallons (177.8 L) of hydraulic oil for immediate use by the hydraulic pumps. If the main tank oil level (shown in a sight gauge) gets low, hydraulic oil is transferred from the 5-gallon (19 L) replenishing tank to the main tank. A second sight gauge shows the level of the hydraulic oil in the replenishing tank.
| NOTICE |
|---|
ONLY ATF TYPE F OIL SHOULD BE ADDED TO THE SYSTEM. |
Cleanliness of the hydraulic oil stored in the two tanks is preserved in several ways. Hydraulic oil being added to the replenishing tank passes through a strainer in the fill pipe and a breather in the top of the tank prevents dust and other large particles from entering the tank as it "breathes". Oil being transferred from the replenishing tank to the main tank passes through a 10 micron filter. A filter on the main tank filters any air drawn into the tank.
Hydraulic oil being drawn from the main tank passes through one of three in-tank strainers.
Water Tank
A sight gauge provides a continuous indication of the water level in the 100-gallon (378.4 L) tank. Water is added through the fillpipe centered in the top of the tank. Water drawn out of the tank by the water system pump flows through a shutoff valve and strainer located under the tank. A plugged port in the bottom of the tank allows the water to be drained.
Cutter Assembly
The cutter assembly includes the cutter, a housing, a planetary gear reducer, a clutch and a belt drive arrangement. Power from the engine is transferred through the pump drive gearbox and the belt drive to the hydraulically actuated clutch. When the cutter control is moved to "On", charge oil pressure from the wheel drive pump is directed to the clutch to engage it. The clutch then turns the high speed side of the planetary gear reducer and the low speed side of the gear reducer turns the cutter with its 48 tungsten carbide bits (teeth). The cutter housing covers the cutter to prevent injuries that could be caused by debris kicked up by the cutter or by coming in contact with the cutter bits.
The cutter assembly also includes a slide plate to which the rest of the assembly mounts. A hydraulic cylinder attached to the cutter slide raises and lowers the cutter assembly in response to the cutter elevation control. The cutter can be positioned from a maximum height above ground of 9 inches (22.9 cm) down to the maximum cutting depth of 6 inches (15.24 cm).
Accessory system hydraulic oil is used for the cutter elevation cylinder (see page 2-23). Wheel drive pump charge pressure is used to engage the cutter clutch and also to cool the cutter clutch.
Consoles And Controls
TRAVEL CONTROL
FRONT CONTROL PANEL
SIDE CONTROL PANEL
The PR-105 has two control consoles that contain most of the machine controls. The travel control is mounted on an arm at the left of the seat.
See Section 3, Controls and Instruments, for a description of the function of each control and instrument.
Auxiliary Cutter Assembly
The optional auxiliary cutter assembly includes a hydraulic pump, a hydraulic motor, a hydraulic cylinder and a housing. The gear reducer and cutter used in the auxiliary cutter assembly are the same as those used in the cutter assembly.
The hydraulic pump, driven by the pump drive gearbox, supplies the pressurized hydraulic oil needed to turn the hydraulic motor. The motor turns the high speed side of the gear reducer and the low speed side of the gear reducer turns the cutter with its 48 tungsten carbide bits (teeth). The housing covers the cutter to prevent injuries that could be caused by debris kicked up by the cutter or by coming in contact with the cutter bits.
The hydraulic cylinder is connected between the mainframe and the auxiliary cutter housing. The cylinder will position the auxiliary cutter anywhere from the maximum height above ground of 12 inches (30.48 cm) to the maximum cutting depth of 5 1/2 inches (14 cm).
A blade and blade holder are also part of the auxiliary cutter assembly. The holder slides up and down in a square tube that is part of the mainframe. The blade rests on the ground and moves debris from the cutting operation outboard of the left wheels.
Accessory system hydraulic oil is used for the auxiliary cutter elevation cylinder (see page 2-21). The auxiliary cutter hydraulic system is described on page 2-25.