Before installing and operating this compressor, read
and understand the safety precautions contained in
LV-474 supplement to and part of CAP-600
IMPORTANT
Make a permanent record of the
Model and Serial number of
your machine here. You’ll save
time and expense by including
this reference identification on
replacement part orders.
*CONSULT FACTORY FOR SPECIAL APPLICATIONS
WARNING
CURTIS-TOLEDO, INC.
1905 Kienlen Avenue
St. Louis, MO 63133
REFER TO MODEL & SERIAL NUMBER.
READ INSTAL. & OPERATION INSTR.
DO NOT OPERATE LOW ER THAN 500
R.P.M. OR ABOVE MAX. AS STIPULATED
BY PERFORMANCE DATA SHEET.
Challenge Air Compressor. Please examine the
compressor for shipping damage(s) and if any are
found report it immediately to the carrier.
Select a clean dry location with a rigid floor strong
enough to support the compressor. If the
compressor is to be located in an area where
vibration is critical, properly engineered vibration
mounts and flexible piping should be used.
Remove the skid. NOTE: The compressor should never be operated on the shipping skid. Level
the compressor so it can be bolted down securely.
Before tightening the bolts, check to see that all
four feet are resting on the foundation. Shim as
necessary to eliminate stress on the receiver or
base when the bolts are tightened. We suggest
using a level for proper alignment.
Maximum ambient temperature in which the
compressor and motor should be operated is
104°F. Therefore, adequate ventilation must be
provided.
The suction openings of the compressor are
equipped with a combination air filter-muffler to
protect the compressor from normal dust and other
harmful substances. If the air around the
compressor is excessively hot, dusty, humid or
contaminated with foreign gases (such as ammonia
or acid fumes) move the filter-muffler to a remote
point where the air is clean, cool and dry. Run a
pipe to the compressor suction opening. If the run
is over 50 feet in length, use a larger pipe to avoid
excessive pressure drop. In order to fit the filter to
the compressor, bush down the connections. Be
sure piping and fittings are clean and free from dirt
and chips. If the filter is installed outside, check to
insure that it is located above the normal outside
dust level, and that rain cannot enter the filter
element. Where the relocation of the filter-muffler
is not possible or feasible, an oil bath filter is
recommended and is available from Curtis.
LIMITED SAFETY PRECAUTIONS
(Also see supplement LV-474)
The following safety precautions are recommended
in the use of this compressor:
1. Use a totally enclosed OSHA-approved belt
guard to cover the drive assembly. Where
possible, place the flywheel toward the wall, and
mount the unit a minimum distance of 2 feet from
the wall for maintenance convenience.
2. Turn off & lock out the electrical disconnect
switch before working on the unit to prevent the
unit from starting unexpectedly
WARNING: Read and understand supplement LV-474 before installing and operating the compressor.
On basic or base mounted compressors run a
discharge pipe to the receiver or optional
aftercooler and bush up or down as necessary.
The pipe should enter near the top of the receiver.
Keep in mind that condensate may form in the
discharge line; therefore, the lines should always
be pitched to drain condensate away from the
compressor. Always provide a safety relief valve in
the discharge line between the compressor and inline shutoff valves. If more than one compressor
pumps into a common system, a check valve in the
discharge line of each compressor is recommended
to prevent moisture from entering the cylinder head
when one compressor is idle. A globe or gate valve
installed in the discharge line will allow compressor
isolation from plant air system for compressor
maintenance. (Note: A safety relief valve should be
located between the compressor and the
globe/gate valve.)
Check the electrical supply for voltage, phase, and
frequency to see that they match the nameplate
stampings on the motor, magnetic starter,
solenoids, and other controls. Use electrical wires
of adequate size to carry the full load current of the
motor without excessive voltage drop. Charts are
available from Curtis (upon request) to provide
information on this. The motor must always be
protected by a starter with properly sized thermal
overload(s). The starter should protect the motor
from overheating and burnout due to an overload,
low voltage or single phasing of a 3-phase circuit.
Failure to install the proper starter and
overloads will void the motor manufacturers
warranty. Follow the National Electric Code or
local electric code in providing wiring, fusing and
disconnect switches. NOTE: Do not close the
disconnect switch to start the compressor until
the procedures outlined under "Startup
Procedures" have been completed.
3. Release all air pressure from the system before
working on the unit and red tag all electrical
control switches, for safety precaution.
4. Do not by-pass motor over-current protection.
5. Do not change the setting or in any way affect
the operation of the safety valve.
6. Keep unit securely anchored so that movement
will not put a strain on piping, wiring, or air
receiver.
2
START-UP PROCEDURES
OIL RECOMMENDATION
Use Genuine CURTISLUBEPLUS Lubricants. Specially
formulated for Curtis Reciprocating Air Compressors. NonDetergent type with anti-foam, anti-rust and oxidation inhibitors.
Recommended ISO68 RC-1000 Premium Reciprocating
Compressor Lubricant, Part no. VO411-3, 12-quart case or
VO411-2, 4 gallon case.
Recommended ISO100 RC-1000A Premium Reciprocating
Compressor Lubricant Part no. VO421-3, 12-quart case or
VO421-2, 4 gallon case.
CURTISLUBEPLUS Lubricants are available through your
authorized Curtis distributor.
CAP-600
If the compressor is equipped with an automatic start-stop
control (with pressure switch unloading), it is automatically
unloaded upon starting, and will automatically load after
attaining running speed. If the compressor is equipped with
a constant speed control (pilot valve unloading), it is
necessary to manually unload the compressor, if there is
pressure in the discharge line, in order to achieve an
unloaded start. The compressor must be manually loaded
after the compressor has attained full running speed, there
after, it functions automatically to maintain operating
pressure until the unit is shut off.
Close the disconnect switch and start the compressor.
Observe the direction of rotation, which should be
counterclockwise when viewed from the flywheel side of the
compressor on all models. For single-phase units, the
direction of rotation is determined by the motor nameplate
instructions, and is adjusted at the factory. For three-phase
units, if the rotation is incorrect, stop the unit and
interchange any two of the three wires to the motor at the
disconnect switch. This will reverse the direction of rotation
of the motor and compressor.
PREVENTIVE MAINTENANCE
A good maintenance program will add years of service to your air
compressor. The following is recommended as a minimum
maintenance program. (TURN OFF POWER BEFORE
SERVICING.)
LUBRICATION
1. For proper lubrication the compressor shall not be
operated below the minimum or above the maximum R. P.M.
recommended for the various models.
2. Maintain oil level mid-way between the upper and lower lines
of the crankcase sight gage.
3. Stop compressor to add and gauge oil.
4. Do not fill above the upper line and do not operate compressor
with oil level below the lower line.
DO NOT OVER FILL
5. Change oil at the first 100 hours of operation and 1000 hours
thereafter, or as required. It may be necessary to change oil
more frequent due to abnormal humid and contaminated
conditions.
DAILY MAINTENANCE
1. Check and maintain oil level at centerline of sight glass and
add oil as necessary.
2. Drain condensate from receiver unless it is equipped with an
automatic tank drain, in which case the drain should be
checked weekly to see that it is operating. See automatic tank
drain instructions.
NOTE ILLUSTRATION:
WARNING: Read and understand supplement LV-474 before installing and operating the compressor.
3. Check for unusual noise or vibration (See "Trouble Shooting".)
WEEKLY MAINTENANCE
1. Clean the air filters. A clogged air filter can seriously affect the
efficiency of the compressor and cause overheating and oil
usage.
2. Clean all external parts of the compressor and driver. Be sure
to clean the intercooler-finned surface on two-stage
compressors. A dirty compressor will cause abnormally high
discharge temperature and resulting oil carbonization on
internal valve components
3. Check the safety valve manually (by pulling ring or lever) to
see that it is not stuck.
MONTHLY MAINTENANCE
1. Inspect the entire air system for leaks.
2. lnspect condition of oil and change if necessary.
3. Check drive belt tension and tighten if needed.
EVERY 3 MOS. OR 1,000 HRS. OF OPERATION
1. Change oil.
2. lnspect valves. Clean the carbon from valves and head if
necessary.
3. Check and tighten if necessary all bolts, nuts, etc.
4. Check unloader operation.
*CHECKING BELT TENSION
The v-belt(s) should be adjusted so that a declination of about 3/8
– 1/2 inch will be obtained when it is pushed by a finger at the
middle point as shown in Figure 1.
CAUTION: Over tightening the v-belt(s) will result in
overloading of the motor and belt failure, while a loose belt
will be slipping and resulting in an unstable speed,
overheating the belt and high amp draw.
3
Figure 1
VALVE INSPECTION AND MAINTENANCE
Valves should be inspected at regular intervals as
recommended under "Maintenance" and cleaned or
replaced when necessary. The valve can be serviced
without disconnecting air piping or removing the head.
(Be sure the power to the motor is disconnected and
all pressure released before starting to work on the
compressor.)
On constant run models, it is necessary to remove the
unloader piping before the valve plugs can be removed.
MODELS E-11 AND E-23 (Figures 2 and 3)
A. Disassembly:
1. Unbolt the outlet valve push cover (70112- 11450).
2. Remove the outlet valve push cover packing (70112-
11650), spring (70112-41070) and valve plate (70112-
31030). CAUTION: Steps 1 and 2 are for outlet valve.
3. Remove the unloading connecting tube for Models
E-11 and E-23.
4. Untighten four cylinder head fixed bolts.
5. Remove cylinder head carefully and turn it over.
6. Unbolt inlet valve receiver (70112-31020).
7. Remove valve spring (70112-31070) and valve plate
(70112-31030).
Valves should be inspected approximately every 1,000
hours of operation. Inspect the valve seats on
cylinder head for dents, cracks or wear. Replace all
defective parts. Remove carbon deposits and wash all
valve components in a suitable non-flammable
cleaning fluid.
B. Assembly:
1. Place outlet valve plate (70112-31030) in position.
2. Place the outlet valve push cover packing (70112-
11650) in position.
3. Insert the spring (70112-41070) into outlet valve push
cover (70112-11450).
4. Turn outlet valve push cover (70112-11450) in position
carefully.
CAP-600
To change tension, loosen the motor hold-down bolts and
slide the motor on the base, using a lever if necessary, or
by turning the adjusting bolt at the end of the base.
Retighten motor hold-down bolts.
NOTE: Do not over tighten belts.
ELECTRIC MOTOR
Grease once a year with a good grade of lithium ball
bearing grease, or as directed by the motor manufacturer.
5. Check the valves to see if they can move freely in their
guides.
6. Turn over the cylinder head (70112-11010).
7. Place the inlet valve plate (70112-31030) in position.
8. Insert the small end of inlet valve spring (70112-
31070) into position of valve receiver (70112- 31020).
9. Screw inlet valve receiver in position.
10. Check the valves to see if they can move freely in their
guides and do not pinch or bind between the seat and
guard legs.
Figure 2
WARNING: Read and understand supplement LV-474 before installing and operating the compressor.
Figure 3
4
MODELS E-50, E-71 AND E-15 (Figures 4 and 5)
A. Disassembly of Inlet Valve Assembly (Figure 4).
1. Untighten the hex nut.
2. Remove unloading fork (70123-31080), unloading fork
guide (70123-31090), unloading spring (70123-11230)
and valve seat (70123-31010).
CAUTION:
1. If a vise is used to hold the valve assembly, be
careful not to clamp the assembly too tight.
2. Valve assembly should be inspected approximately
every 1,000 hours of operation.
3. Inspect the valve seat for dents, cracks or wear.
4. Replace all defective parts.
5. Valve seats that might be worn after years of
operation can be re-lapped or re-ground, in this
case the recess in which the valve guard legs fit
must also be cut down accordingly to ensure a
same valve lift.
6. Remove carbon deposits and wash all valve
components in a suitable non-flammable cleaning
fluid.
B. Reassembly of Inlet Valve Assembly
1. Place valve spring (70123-31070) and valve plate
(70123-31030) on valve receiver (70123-31020).
2. Place valve seat (70123-31010), unloading fork guide
70123-31090), unloading spring (70123- 11230) and
unloading fork (70123-31080) respectively.
3. Tighten the valve assembly by tightening the hex nut.
4. Check the valves to see if they can move freely in their
guides and do not pinch or bind between the seat and
guard legs.
C. Disassembly of Outlet Valve Assembly (Figure 5)
1. Untighten the hex nuts.
2. Remove valve receiver (70123-41020), valve spring
(70123-41070) and valve plate (70123-31030).
CAUTION: Refer to disassembly of inlet valve assembly
(paragraph B).
CAP-600
D. Reassembly of Outlet Valve Assembly
1. Place valve spring (70123-41070) in valve receiver
70123-41020).
2. Place valve plate (70123-31030) in valve receiver.
(70123-41020).
3. Insert the sub-assembled part (assembled in
step I and 2) into valve seat (70123-41010).
4. Tighten the hex nuts.
5. Check the valves to see if they can move freely in their
guides and do not pinch or bind between the seat and
guard legs.
FIGURE 4 (EXAMPLE SHOWN E-50)
WARNING: Read and understand supplement LV-474 before installing and operating the compressor.
FIGURE 5
5
(EXAMPLE SHOWN E-50)
VALVE ASSEMBLY INSTALLATION - E-50 MODEL
(Figures 6 and 7)
1. Install valve assembly gasket (70123-11110)
2. Install valve assembly (70123-31000).
3. Install valve push cover (70123-11150).
4. Install head bolt and tighten evenly and securely.
It is strongly recommended that a Preventative
Maintenance Kit & Valve/Gasket Maintenance Kit be kept
on hand. In this manner, the valves can be used in turn to
keep the compressor always in good condition and a
minimum downtime.
FIGURE 6
CAP-600
PISTON RINGS (Rebuild Kit)
To inspect or replace piston rings as follows:
1. Remove cylinder head.
2. Remove cylinder.
3. Loosen the connecting rod bolts.
4. Push out the piston with piston rings and connecting
rod.
5. To remove the old rings, pry them out of their grooves
and slide them over the piston. Care should be taken
not to damage the piston.
6. Inspect the ring grooves for nicks and carbon deposits.
Clean the ring grooves and remove the obstructions,
which might prevent the rings from moving freely.
To install new rings on the piston as follows: (Be
careful not to damage the piston and rings).
1. Install the oil control ring (70123-61050) first. Rotate
ring in groove to make sure it is free.
2. Install the Compression ring (70123-61030). Make sure
the "top" or "R" mark is exactly on top. If not, it might
cause excessive oil consumption.
3. Repeat the process with other rings, if any.
4. Assemble connecting rod into the crankshaft. Be sure
that the connecting rod and its cap are in original pair
and position, since the connecting rod cap and
crankshaft pin bushing are selected fitted and are not
interchangeable.
5. Check if the ring gaps are in proper positions (Figure 8).
FIGURE 8
WARNING: Read and understand supplement LV-474 before installing and operating the compressor.
6
CAP-600
• REBUILD KITS
AIR COOLED SINGLE STAGE MODELS
PART
NO.
CF1237
1 70112-11461 Copper Gasket
ES05
CONSISTS OF:
PART
NO.
CF1299
ES03
CONSISTS OF:
1 70111-66140 Filter Element 1 70111-66140 Filter Element
2 70111-31030 Valve Disc 2 70112-31030 Valve Disc
1 70111-31070 Spring 1 70112-31070 Spring
1 70111-41070 Spring 1 70112-41070 Spring
1 70111-11461 Gasket 2 70112-61030 Comp. Ring
1 70111-11612 Head Gasket 1 70112-61050 Oil Ring
2 70111-61030 Comp. Ring 1 70112-11612 Head Gasket
1 70111-61050 Oil Ring 1 70112-51610 Crankcase Gasket
1 70111-57970 Bottom Cover Gasket 1 70112-57950 Front Cover Gasket
1 70111-57950 Front bearing cover gasket 1 70112-57960 Rear Cover Gasket
1 70111-57080 Front Oil Seal 1 70112-57080 Oil Seal
1 70111-57960 Rear Cover Gasket 12 92521-190800 Copper Washer
10 92521-190600 Copper Washer
ES06 ES10, ES10P ES20
PART
NO.
CF1302
CONSISTS OF:
2 70111-66140 Filter Element 2 70111-66140 Filter Element 3 70111-66140 Filter Element
4 70111-31030 Valve Disc 4 70112-31030 Disc 6 70112-31030 Disc
2 70111-31070 Spring 2 70112-31070 Spring 3 70112-31070 Spring
2 70111-41070 Spring 2 70112-41070 Spring 3 70112-41070 Spring
2 70111-11461 Gasket 4 70112-61030 Compression Ring 6 70112-61030 Compression Ring
2 70111-11612 Head Gasket 2 70112-61050 Oil Ring 3 70112-61050 Oil Ring
2 70121-51610 Crankcase Gasket 2 70112-11612 Head Gasket 3 70112-11612 Head Gasket
4 70111-61030 Comp. Ring 2 70112-51610 Crankcase Gasket 3 70112-51610 Crankcase Gasket
2 70111-61050 Oil Ring 1 70122-57950 Front Cover Gasket 1 70122-57950 Front Cover Gasket
1 70121-57950 Front Cover Gasket 1 70122-57960 Rear Cover Gasket 1 70122-57960 Rear Cover Gasket
1 70111-57960 Rear Cover Gasket 1 70122-57080 Front Oil Seal 1 70122-57080 Front Oil Seal
1 70121-57970 Bottom Cover Gasket 24 92521-190800 Copper Washer 26 92521-190800 Copper Washer
1 70153-66142 Element 2 70123-66140 Element 2 70123-66140 Element 2 70123-66140 Element
4 70153-31032 Disc 6 70123-31030 Disc 4 70124-31030 Disc 4 70125-31030 Disc
2 70153-32032 Disc 3 70123-31070 Spring 2 70123-31030 Disc 2 70175-42030 Disc
4 70153-31072 Spring 3 70123-41070 Spring 2 70124-31070 Spring 2 70125-31070 Spring
2 70153-32072 Spring 6 70123-11110 Seat Gasket 1 70123-31070 Spring 1 70124-31070 Spring
1 70153-31120 Head Gasket 3 70123-11612 Head Gasket 2 70124-41070 Spring 6 70125-41070 Spring
1 70153-11612 Seat Gasket 1 70123-41070 Spring 1 70124-41072 Spring
1 70153-11622 Seat Gasket 4 70124-11110 Seat Gasket 4 70125-11110 Seat Gasket
2 70123-11110 Seat Gasket 2 70124-11110 Seat Gasket
2 70124-11612 Head Gasket 4 70125-87510 Manifold Gasket
1 70123-11612 Head Gasket 2 70125-11610 Head Gasket
1 70124-11612 Head Gasket
** 70135-11610 Head Gasket
1 70153-57951 Front Bearing Gasket 1 70123-57950 Front Bearing Gasket 1 70124-57950 Front Bearing Gasket 4 70125-61030 Compression Ring
2 70124-61030 Compression Ring 4 70123-61030 Compression Ring 4 70124-61030 Compression Ring 4 70125-61050 Oil Ring
2 70124-61050 Oil Ring 4 70123-61050 Oil Rings 4 70124-61050 Oil Ring 3 70124-61030 Compression Ring
3 70153-62030 Compression Ring 3 70112-61030 Compression Ring 3 70123-61030 Compression Ring 2 70124-61050 Oil Ring
1 70153-62050 Oil Ring 1 70112-61050 Oil Ring 2 70123-61050 Oil Ring 2 70125-61081 Bushing
1 70153-61081 Bushing (L.P.) 2 70123-61081 Bushing 2 70124-61080 Bushing 3 70125-61090 Rod Bearing (2 Halves)
1 70153-62081 Bushing (H.P.) 1 93503TA1725 Needle Bearing 1 70174-62081 Bushing 3 70135-51610 Gasket
4 70153-61090 Rod Bearing (Halves) 6 70123-61090 Rod Bearing (Halves) 3 70124-51610 Gasket 1 70134-57080 Oil Seal
1 70153-51611 Case Gasket 3 70123-51610 Crankcase Gasket 1 70134-57080 Oil Seal 1 70135-57950 Front Bearing Gasket
1 70123-57080 Oil Seat 1 70123-57080 Oil Seal 6 70124-61090 Bearing (Halves) 1 70134-57960 Rear Bearing Gasket
1 70153-57961 Rear Bearing Gasket 1 70133-57960 Rear Bearing Gasket 1 70134-57960 Rear Bearing Gasket 24 92521-191200 Copper Washer
1 70173-62080 Bushing 1 70175-62080 Bushing ****
INCLUDES
VALVE/GASKET MAINT KIT
INCLUDES:
PART
NO.
CF1315
CF1253
CONSISTS OF:
PREVENTATIVE MAINTENANCE
KIT INCLUDES:
VALVE/GASKET MAINT KIT
INCLUDES:
PART
NO.
CF1315
CF1255
CONSISTS OF:
PREVENTATIVE MAINTENANCE
KIT INCLUDES:
VALVE/GASKET MAINT KIT
INCLUDES:
PART
NO.
CF1315
CF1257
CONSISTS OF:
PREVENTATIVE MAINTENANCE
KIT INCLUDES:
VALVE/GASKET MAINT KIT
INCLUDES:
* WARNING – THESE ITEMS INTERCHANGE WITH PARTS ON SERIAL #3020000 & HIGHER ONLY.
CONTACT FACTORY FOR EARLIER SERIES.
** USE WITH SERIAL #A311XXXX AND LATER
70135-11610 REPLACES 70125-11610
*** USE WITH SERIAL #A409XXXX AND LATER
**** USE FOR UNITS PRIOR TO SERIAL #A409XXXX
.
8
CAP-600
RING SETS & GASKET SETS
SINGLE STAGE
QUANTITY
MODEL PART NO. DESCRIPTION
ES03
ES05
ES06
ES10
ES20
ES30
ES50
ES100
ES150 &
ES150A
CF1297
CF1298
CF1259
CF1276
CF1300
CF1301
CF1260
CF1277
CF1261
CF1278
CF1262
CF1279
CF1263
CF1280
CF1264
CF1281
CF1265
CF1282
*CF1311
Ring set
Gasket set
Ring set
Gasket set
Ring set
Gasket set
Ring set
Gasket set
Ring set
Gasket set
Ring set
Gasket set
Ring set
Gasket set
Ring set
Gasket set
Ring set
Gasket set
*Gasket set
REQ’D
1
1
1
1
2
1
2
1
3
1
2
1
3
1
3
1
3
1
1
TWO-STAGE
MODEL PART NO. DESCRIPTION
CF1266
E11
E23
E35
E50
E57
E71
E15
* USE WITH SERIAL #A311XXXX AND LATER
CF1267
CF1283
CF1268
CF1269
CF1284
CF1303
CF1304
CF1305
CF1270
CF1271
CF1285
CF1288
CF1289
CF1290
CF1272
CF1273
CF1286
CF1274
CF1275
CF1287
*CF1313
Ring set (LP)
Ring set (HP)
Gasket set
Ring set (LP)
Ring set (HP)
Gasket set
Ring set(LP)
Ring set(HP)
Gasket set
Ring set(LP)
Ring set(HP)
Gasket set
Ring set(LP)
Ring set(HP)
Gasket set
Ring set(LP)
Ring set(HP)
Gasket set
Ring set(LP)
Ring set(HP)
Gasket set
*Gasket set
QUANTITY
REQ’D
1
1
1
2
1
1
1
1
1
2
1
1
1
1
1
2
1
1
2
1
1
1
9
MODEL ES-03
AIR COOLED, SINGLE STAGE, SINGLE CYLINDER
CAP-600
Description QTY PART NO.
VALVES
1. Inlet & Outlet Valve Plate 2 70111-31030
2. Inlet Valve Spring 1 70111-31070
3. Inlet Valve Receiver 1 70111-31020
4. Inlet Valve Snap Ring 1 93610-130225
5. Outlet Valve Spring 1 70111-41070
6. Outlet Valve Push Cover Gasket 1 70111-11461
7. Outlet Valve Push Cover 1 70111-11450
8. Manual Unloader Assembly 1 70111-11300
9. CYLINDERS
9A. Cylinder Head Assembly (Includes Valves) 1 70111-11000-4024
9B. Cylinder Head (Bare Casting) 1 70111-11010
10. Cylinder Head Bolt (Not Shown) 4 (Hardware Item)
60. Connecting Rod Bearing (2 Halves) 2 70153-61090
61. Crankshaft 1 70153-56011
62. Piston Pin (1
63. Compression Ring (2
64. Piston Pin (2
65. Oil Control Ring (2
66. Piston (2
67. Breather Assembly 1
68. V-Pulley Pin 1 70123-56061
69. Nut (Connecting Rod) 4 92501-230800
70. Spring Washer (Connecting Rod) 4 92522-130800
71. Bolt (Connecting Rod) 4 70153-61250
72. Front Cover Gasket 1 70153-57951
73. Front Cover 1 70153-57030
74. Front Oil Seal 1 70123-57080
75. Copper Washer 4 92521-190800
76. Bolt (Front Cover) 4 91501-1310030
77. Compressor Pulley 1 70153-76011
78. Compressor Pulley Thrust Washer 1 70123-76210
79. Compressor Pulley Bolt 1 91501-1310030
80. Unloading Elbow * # 1 VA786
81.
82. Unloader Cover (2
83. Viton O-Ring Unloader (2
84. Unloading Piston (2
85. Unloading Spring (2
86. Unloader Body (2
87. Air Strainer Assembly (Includes 88-93) 1 70153-66002
88. Air Strainer Cover Gasket 1 70153-66132
89. Air Strainer Cover 1 70153-66121
90. Air Strainer Bolt 1 70153-66160
91. Air Strainer Element 1 70153-66142
92. Nut (Self Lock) Air Strainer 1 92507-230600
93. Air Strainer Body 1 70153-66012
94. Intercooler Safety Valve (Not Shown) 1 VV431
95. Gasket, Copper 1 70152-12280
96. HHCS, ¼-20 X ½” LG 2 VH12FD
97. Lock washer, split ¼” 2 VH35F
98. Plate, Cover, Flange 1 CA2323
99. Gasket, Plate Cover 1 CA2312
DESCRIPTION QTYPART NO.
s
) 2 70124-61030
s
s
) 1 70153-61011
n
) 1 70153-62011
Unloader Assembly (2nd)(Includes 82-86)
) 2 70124-61050
s
) 1 70153-61211
s
s
) 1 70153-61081
n
) 1 70153-62081
s
) 1 70153-61121
n
n
) 1 70153-62121
n
) 1 70153-62050
n
) 1 70103-11271
n
) 1 70153-12222
n
) 1 70103-11231
n
) 1 70103-11211
)*** 1 70153-62211
n
) 1 70153-62211
n
) ** 1 93503-TA2420
s
)*** 1 93503-TA2420
) 3 70153-62030
n
) 1 93601-870009
CAP-600
CCC1258
1 70153-12201
29
CAP-600
INSPECTION & MAINTENANCE OF
E-57 VALVE ASSEMBLY
INSTRUCTION FOR E-57 COMPRESSOR MODEL HEAD VALVE ASSEMBLY INSPECTION AND MAINTENANCE.
Model E-57 valve assembly inspection and maintenance instruction.
1. Inspect valve assemblies every 1000 hours of operation or as necessary to maintain efficient operation.
2. Turn off power, red tag power supply switch (caution: Maintenance in progress – DO NOT START). Drain all air
pressure from system before starting work.
3. Disconnect air piping from head.
Remove valve package.
A1. Loosen and remove head bolts. On constant run models, remove upper tubing from unloader cylinder.
A2. Remove cylinder head to expose valve assembly.
A3. Remove valve assembly, head to valve package gasket and valve package to cylinder gasket. Use new gaskets in
re-assembly. Note conditions of cylinders, clean out any foreign material and cover with clean shop cloth while open.
A4. Refer to parts breakdown for description of valve package.
A5. Secure valve assembly package, loosen and remove socket head bolts to separate the upper and lower valve seats.
This will expose the valve springs and valve plates.
CAUTION: Do not interchange upper and lower valve seats
A6. Thoroughly clean and wash all valve seats and parts with a suitable non-flammable cleaning fluid.
CAUTION: Use care to not scratch or deform valve parts in the cleaning.
A7. Carefully inspect the valve seats, plates and springs for dents, cracks, wear, and any reason to prevent proper and
efficient operation.
A8. Replace all parts not in proper condition.
Assemble valve assembly package.
B1. Secure lower valve plate in flat position with spring slots “up”.
B2. Refer to parts breakdown for valve package breakdown.
B3. Place valve springs and valve plates in proper positions over slots in seat. Use tag wire or string for tie to hold in
position for completing assembly.
B4. Secure upper valve seat in flat position with spring slots up
B5. Use new valve seat gasket.
B6. Place valve seat gasket in position on lower valve plate.
B7. Place upper valve seat with valve springs and plates tied in position on top of lower valve seat with new valve seat
gasket in place between the two seats.
B8. Start center and then two end valve plates socket head bolts, tighten finger tight being careful not to damage seat
gasket, use socket head wrench to torque the three bolts uniformly to secure the top valve seat to the lower valve
seat using care to avoid damage to the gasket, and valve springs and plates from moving out of position.
B9. Remove ties to free valve springs and plates
B10. Check to be sure valve springs and valve plates are in proper position and the plates are free to flex when manually
touched with blunt instrument.
Assemble valve assembly package into compressor.
C1. Use new gaskets, valve package to cylinder and cylinder head to valve package. Select gaskets by part numbers
from parts breakdown.
C2. Remove shop cloth to expose open cylinder bores. Remove any foreign matter from cylinder bores and top of
cylinder.
C3. Place gasket on top of cylinder, place and align valve package, place gasket on top of valve package and align holes
for head bolts.
C4. Place clean head on top of valve package with gasket and align with cylinder bolt holes.
C5. Insert cylinder head bolts using care to avoid damage to the gaskets, start each bolt threading evenly to contact head
surfaces.
C6. Torque head bolts equally, follow torque specifications on page 20.
C7. Attach and tighten copper tubing of constant running compressors.
C8. Assemble and tighten discharge tubing.
C9. Check oil level in crankcase
C10. Close and tighten valve or the connections used to drain air pressure from system.
C11. Remove all tools and make area safe to start compressor.
C12. Turn on power at main switch and inspect to see that unit is operating properly.
C13. Stay with unit for normal pump up to cut out pressure.
C14. If unit has performed through a running cycle properly put on line for duties and remove red tag from power supply
switch.
C15. Make entry in equipment maintenance log.
30
CAP-600
VALVE PLATES DESIGNS FOR E-57 COMPRESSOR
31
CAP-600
CM-FT.
TORQUE
INLET & OUTLET
VALVE PUSH COVERS
SIZE
BOLT
CM-FT.
TORQUE
100-6.8
100-6.8
100-6.8
180-13.0
180-13.0
180-18.0
225-16.3 225-16.3
M8-1.25
180-13.0
280-20.25
300-21.7
225-16.3 225-16.3
M8-1.25
M8-1.25
280-20.25
300-21.7
280-20.25
225-16.3
M8-1.25
M8-1.25
280-20.25
280-20.25
320-23.1
320-23.1
M10-1.5
M10-1.5
L
28-120.25
280-20.25
225-16.3
M8-1.25
H
REAR COVER
FRONT COVER
ROD BOLTS
SIZE
BOLT
CM-FT.
TORQUE
SIZE
BOLT
CM-FT.
TORQUE
SIZE
BOLT
CM-FT.
TORQUE
M6-1
100-6.8
M6-1
135-9.7
M6-1
M6-1
M6-1
100-6.8
180-13.0
M6-1
M8-1.25
135-9.7
180-13.0
M6-1
M8-1.25
120-8.7
200-14.5
M8-1.25
180-13.0
M8-1.25
180-13.0
M8-1.25
200-14.5
M8-1.25
180-13.0
M8-1.25
180-13.0
M8-1.25
200-14.5
M8-1.25
180-13.0
M8-1.25
180-13.0
M8-1.25
200-14.5
M8-1.25
180-13.0
M8-1.25
180-13.0
M8-1.25
200-14.5
M10-1.5
M8-1.25
180-13
280-20.25
M10-1.5
M8-1.25
180-13
280-20.25
M10-1.5
M8-1.25
200-14.5
280-20.25
M10-1.5
M10-1.5
280-20.25
280-20.25
M8-1.5
M8-1.5
280-20.25
280-20.25
M8-1.5
M8-1.5
280-20.25
280-20.25
M8-1.25
M10-1.5
300-21.7
300-21.7
M8-1.5
M10-1.5
300-21.7
280-20.25
M8-1.5
M8-1.25
280-20.25
280-20.25
M10-1.5
M10-1.5
300-21.7
320-23.11
M8-1.5
M10-1.5
300-21.7
320-23.1
M8-1.5
M10-1.5
350-25.3
280-20.25
M10-1.5
320-23.1
M10-1.5
320-23.1
M10-1.5
350-25.3
BOLT TORQUES FOR CHALLENGE AIR COMPRESSORS
CYLINDER-CASE
HEAD BOLTS
SIZE
BOLT
TORQUE
SIZE
BOLT
CM-FT.
120-8.7
M6-1
ES03
M8-1.25
200-14.5
M8-1.25
ES05
M6-1
120-8.7
M6-1
ES06
M8-14.5
200-14.5
M8-1.25
ES10
M8-1.25
200-14.5
M8-1.25
E11
M8-1.25
200-14.5
M8-1.25
ES20
32
M8-1.25
200-14.5
M8-1.25
E23
M10-1.5
M8-1.25
300-21.7
200-14.5
M10-1.5
M8-1.25
E35
ES30
M10-1.5
300-21.7
M10-1.5
ES50
M10-1.5
300-21.7
M10-1.5
E50
M10-1.5
320-23.1
M10-1.5
E57
M10-1.5
320-23.1
M10-1.5
ES100
M10-1.5
320-23.1
M10-1.5
E71
M10-1.75
320-23.1
M10-1.5
ES150
M10-1.75
320-23.1
M10-1.5
E15
CAP-600
BOLT TORQUES
MODEL
NO.
ES03 8 96 - ES05
ES06
ES10
E11
ES20
E23
E35
E57 23 276 - ES30 30 360 - -
FLYWHEEL BOLTS FAN BOLTS
TORQUE
FT.-LBS.
12 144 - -
TORQUE
IN.-LBS.
TORQUE
FT.-LBS.
TORQUE
IN.-LBS.
ES50
E50
E71
ES100
E15
ES150
40 480 - -
45 540 24 288
50 600 24 288
33
CAP-600
OIL CAPACITIES
MODEL
NUMBER
HORSEPOWER
ES03 1/4 – 1/2 500 1/2 PINTS
ES05 1/2 500 1/2 PINTS
ES06 3/4 500 10 OUNCES
ES10 1 500 1¼ PINTS
ES20 2 – 3 500 1¾ PINTS
ES30 3 – 5 500 1¼ PINTS
MIN
RPM
OIL CAPACITY
ES50 5 – 7½ 500 1½ QUARTS
ES100 7½ - 10 500 2½ QUARTS
ES150
ES150A
15 500 5 QUARTS
E11 1 500 1¼ PINTS
E23 2 – 3 500 1¾ PINTS
E35 3 – 5 500 2½ PINTS
E50 5 500 1½ QUARTS
E57 5 – 7½ 500 2 QUARTS
E71 10 500 2½ QUARTS
E15 15 500 5 QUARTS
34
TROUBLESHOOTING
Flywheel rotation in wrong direction Incorrect connection of motor terminalRe-arrange terminal connection.
Overheating of bearings 1. Insufficient lubrication.
Flywheel rotation slows down 1. Heavy lubrication oil.
Severe vibration Bent crankshaft Remove & Replace
Abnormal noise 1. Loose valve assembly.
WHEN COMPRESSOR CAN BE STARTED
Pressure cannot be built up or only
up to a certain extent
Inaccuracy of pressure gauge Pressure gauge damaged. Replace.
Excessive oil consumption 1. Worn piston ring
Slipping of belts 1. Working pressure too high.
Overheating of electric motors 1. Overloading of motor due to
CANNONT BE STARTED
Unit will not start 1. Breakdown of electric current.
WHEN COMPRESSOR
Fuse tends to blow 1. Incorrect size.
CURTIS-TOLEDO
SYMPTOMS CAUSES REMEDIES
1. Add lubrication oil.
2. Bad lubrication system.
3. Crankshaft bearings to tight.
2. Drop in voltage.
3. Belts slipping.
2. Piston hits cylinder cover.
3. Worn connecting rod bearing.
1. Worn valve plate.
2. Valve springs have lost their
temper.
3. Dirt on the valve plate.
4. Leaks from safety valve.
5. Leaks from bolt holes.
6. Uneven valve seat surface.
7. Excessive blow by on piston rings.
8. Bad packing (gasket to thick).
9. Excessive air leaks.
2. Worn piston.
3. Worn cylinder.
2. Improper belt tension.
3. Worn belt.
excessive working pressure
(higher than stipulated pressure).
2. Burnt piston.
3. Burnt bearing metals.
4. Drop of voltage.
2. Line failure.
3. Malfunction of motor
2. Wrong connections
3. Overloading of motor.
4. Overloading of motor due to leaks
of outlet valve.
5. Crankshaft too tight.
2. Remove and examine the system.
3. Readjust load on bearings.
1. Refill with lighter lubrication oil.
2. Contact power company or install
a transformer.
3. Tighten belts
1. Tighten valve bolt and lock nut.
2. Check piston & rod assembly for
excessive wear.
3. Replace bearing.
1. Repair or replace valve plate.
2. Replace valve springs.
3. Remove and clean it.
4. Repair or replace safety valve.
5. Tighten the nuts even with
packing.
6. Remove and lap the surface.
7. Replace with new ones
8. Replace packing (gasket).
9. Eliminate air leaks.
1. Replace.
2. Replace.
3. Replace.
1. Lower working pressure.
2. Adjust belt tension.
3. Replace with new ones.
1. Lower working pressure.
2. Rebuild compressor.
3. Rebuild compressor.
4. Contact power company or install
a transformer
1. Contact power company.
2. Examine the line. Replace with
new wiring.
3. Contact motor manufacturer.
1. Replace with correct size.
2. Change connections.
3. Eliminate the loading.
4. Remove and repair outlet valve.
5. Remove crankshaft and examine
it for cause.
CUSTOMER SERVICE (314) 383-1300
CAP-600
35
CAP-600
RECOMMENDED STATEMENT ON DRYERS AND FILTERS
Liquid water occurs naturally in air lines as a result of compression. Moisture
vapor in ambient air is concentrated when pressurized and condenses when cooled in
downstream air piping.
Compressed air dryers reduce water vapor concentration and prevent liquid
water formation in compressed air lines. Dryers are necessary companion to air filters,
aftercoolers, and automatic tank drains for improving the productivity of compressed air
systems.
Water and water vapor removal increases the efficiency of air operated
equipment, reduces contamination and rusting, increases service life of pneumatic
equipment and tools, prevents air line freeze ups, and reduces product rejects. The use
of dryer’s filters is recommended when this moisture related problems are reported to
our factory or distributor service departments.
Troubleshooting guide
Symptom: Liquid water present in compressed air lines.
Problem: Water vapor condensation from cooling and
compression occurs naturally
Solution: Remove the water vapor from compressed air prior to
distribution through the air system. Check operation of
after-cooler and moisture separator. Install a compressed
air dryer sized for the flow and dryness level required.
(Note: filters may also be required to remove
particles, liquid oil aerosols, or for oil vapor removal.
Change cartridges as recommended by filter manufacturer.)
Check all drain traps routinely to insure their proper operation.