Carrier 69NT40-541-300, Операция и обслуживание, Страница: 123 / 152

6 − 35 T − 318
1. Volt-ohmmeter set on RX 10,000 ohms.
Connect ohmmeter leads across the capacitor
terminals and observe the meter needle. If the capacitor
is good, the needle will make a rapid swing toward zero
resistance and then gradually swing back toward a very
high resistance reading. The reading should read about
330,000 ohms (for a good capacitor) due to the
discharge resistors.
If the capacitor has failed open, the ohmmeter needle
will not move when the meter probes touch the
terminals. If the capacitor is shorted, the needle will
swing to zero resistance position and stay there.
2. Capacitor analyzer:
The function of the analyzer is to read the microfarad
value of a capacitor and to detect insulation breakdown
under load conditions. The important advantages of an
analyzer are its ability to locate capacitors that have
failed to hold their microfarad ratings, or those that are
breaking down internally during operation. It is also
useful in identifying capacitors when their microfarad
rating marks have become unreadable.
Table 6-6 Recommended Bolt Torque Values
BOLT DIA. THREADS TORQUE N.m
FREE SPINNING
#4
#6
#8
#10
1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
40
32
32
24
20
18
16
14
13
12
11
10
5.2in-lbs
9.6in-lbs
20in-lbs
23in-lbs
75in-lbs
11ft-lbs
20ft-lbs
31ft-lbs
43ft-lbs
57ft-lbs
92ft-lbs
124ft-lbs
.6
1.0
2.25
2.6
8.4
1.52
2.76
4.28
5.94
7.88
12.72
17.14
NONFREE SPINNING (LOCKNUTS ETC.)
1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
20
18
16
14
13
12
11
10
82.5in-lbs
145.2in-lbs
22.0ft-lbs
34.1ft-lbs
47.3ft-lbs
62.7ft-lbs
101.2ft-lbs
136.4ft-lbs
9.3
16.4
30
46
64
85
137
168
Table 6-7 Wear Limits For Compressors
PART NAME
FACTORY MAXIMUM FACTORY MINIMUM
MAXIMUM WEAR
BEFORE REPAIR
inches mm inches mm inches mm
MAIN BEARING
Main Bearing Diameter
1.6268 41.3207 .0020 0.0508
Main Bearing Journal Diameter 1.6233 41.2318 .0020 0.0508
PUMP END
Main Bearing Diameter
1.3760 34.9504 .0020 0.0508
Main Bearing Journal Diameter 1.3735 34.8869 .0020 0.0508
CONNECTING ROD 1.3768 34.9707 .0020 0.0508
Piston Pin Bearing 0.6878 17.4701 .0010 0.0254
CRANKPIN DIAMETER 1.3735 34.8869 .0025 0.0635
Throw 1.072 27.2288 1.070 27.1780
THRUST WASHER (Thickness) 0.154 3.9116 0.1520 03.8608 .0250 0.6350
CYLINDERS
Bore
2.0010 50.8254 .0020 0.0508
Piston (Diameter) 1.9860 50.4444 .0020 0.0508
Piston Pin (Diameter) 0.6873 17.4574 .0010 0.0254
Piston Ring Gap 0.013 00.3302 0.0050 00.1270 .0250 0.6350
Piston Ring Side Clearance 0.002 00.0508 0.0010 00.0254 .0020 0.0508