WHEEL 1B1371 - Caterpillar

Characteristics of the 6V3150 Engine Pressure Group:
1. It weighs 2.7 Kg (6 lb) less, without 6V2100 Multitach, than the former 4S6553 Group.2. It comes in a green polyethylene case (plastic) to provide a cost and weight advantage and does not scratch or permanently dent.3. It has an anodized aluminum panel.4. It uses dual scale gauges: inches of water or psi and kPa.5. It is one of the first of a new series of Caterpillar Diagnostic Tools. This family is easily identified by a green polyethylene case with black panels and white printing.6. It has enough space for the storage of the new 6V2100 Multitach (part of 6V3121 Multitach Group) to give a "boost kit" assembled of modular tools.1. Weight: 5.0 Kg (11 lb), without 6V2100 Multitach.2. Size: 39 mm × 311 mm × 101 mm (15.5" × 12.25" × 5.50").3. Gauge Accuracies Over Specified Operating Temperature Range: 4" diameter differential: 2% of full scale2 1/2" diameter single port - SAE Grade "A" (2%-1%-2%)4. Operating Temperature Range: 4" diameter differential gauge: - 1.1 to 60°C (30 to 140°F)2 1/2" diameter single port: - 18 to 71.1°C (0 to 160°F)5. Overrange Pressures: 4" diameter differential gauges: 15 psi2 1/2" diameter single port gauges - pressures above full scale destroy gauge accuracy6. Pressure Media: 4" diameter differential gauges - clean air and gases only, no fluids2 1/2" diameter single port gauges - air, oil, water, antifreeze, diesel fuel7. Operating Position: 4" diameter differential gauges - no effect on accuracy if pointer is mechanically adjusted to zero.2 1/2" diameter single port gauges - no effect on accuracyThe uses of the different gauges in the 6V3150 Engine Pressure Group are listed below.
The 5P6579 Differential Gauge, 4" diameter, is used to measure:
* Crankcase Pressure* Air Inlet Restriction* Exhaust Restriction* Gas Pressure for Gas EnginesThe 6V4016 Gauge (0 to 160 psi), single port, is used to measure:
* Oil Pressure* Air Compressor Cut-in and Cut-out ReadingsThe 6V4017 Gauge (-15 to +60 psi), single port, is used to measure:
* Inlet Manifold Pressure on Turbocharged Engines* Manifold Vacuum on Natural Gas and Gasoline Engines* Power Balancing of Twin Engines in a Natural Gas or Diesel ApplicationThe 6V4018 Gauge (0 to 60 psi), single port, is used to measure:
* Fuel Pressure* Inlet Manifold Pressure on Turbocharged Engines* Cooling System PressureThese uses are examples only but are not the complete list. This group is not limited to "Engines" only, but is a "low pressure" group with many field service uses.
6V3121 Multitach Group
The 6V3121 Multitach Group contains the 6V2100 Multitach and the items needed for its use.
Illustration 3. The 6V3121 Multitach Group.The 6V2100 Multitach is a small digital tachometer that contains a microcomputer which can be programmed by the serviceman to change different input signals into an R/MIN indication which is shown on the front panel readout. It has a range of 40 to 9999 R/MIN with an accuracy of 1 R/MIN. Programming and control of the Multitach is done by use of the touch switches mounted on the