In the normal position both the pressure and vacuum valves of the Tridon ...
additional vacuum valve to allow coolant or air to return to the radiator as .... Page
6 ...
Radiator Caps The Tridon radiator cap range has been developed to operate within original equipment manufacturer’s specifications. Photographs and technical specifications are shown for each Tridon part number. The Tridon radiator cap range contains 74 part numbers available in metal or plastic design suitable for use on sealed, recovery vehicle cooling systems or open, non recovery vehicle cooling systems. As the radiator cap must be compatible with the vehicle cooling system, always refer to the vehicle application list to ensure the correct part number is selected.
Radiator Caps
Selection
The radiator cap is designed to seal the cooling system to prevent coolant loss, maintain pressure within the cooling system and raise the boiling point of the coolant. Radiator caps are manufactured to a predetermined pressure rating, utilising either metal or plastic design, and are suitable for use on sealed recovery or open non recovery vehicle cooling systems.
The Tridon radiator cap range has been developed to operate within original equipment manufacturer’s specifications. As the radiator cap must be compatible with the vehicle cooling system, always refer to the vehicle application list to ensure the correct part number is selected. Failure to use the correct radiator cap may result in severe engine damage.
Recovery Caps (double seal)
Always check the following prior to installing a new radiator cap: • Radiator cap style (Recovery or Non Recovery) • Radiator cap dimensions • Correct operating pressure
In a sealed or recovery cooling system the recovery radiator cap (double seal) allows coolant to flow to and from the recovery or expansion tank, maintaining the integrity of the cooling system. In a correctly operational recovery cooling system, coolant checks are only required at OEM recommended service intervals as the coolant is maintained within the system.
Non Recovery Caps (single seal) The open or non recovery cooling system does not have a recovery or expansion tank; the non recovery radiator cap (single seal) allows the release of coolant and the return of air to the cooling system. The non recovery cooling system requires regular coolant checks and replacement to ensure the system does not run dry. NOTE: A recovery radiator cap (double seal) may be used on a non recovery system, however a non recovery radiator cap cannot be used on a recovery cooling system.
Safety Lever Radiator Caps Safety Lever Caps are suitable for both performance and mining applications preventing scalding and burns during cap removal. This cap has an inbuilt lock where the lever must be lifted prior to turning to enable the cap to be removed. Safety lever caps feature a stainless body and brass 93 pin to conform to mining requirements. The cap contains no aluminium components. All lever caps are recovery style covering standard bayonet and small bayonet Japanese (CA, CB series). There are 7 part numbers available in lever style caps (refer to page 95 for range and pressures).
Additional vehicles and applications may have been introduced after the time of catalogue printing. For complete, up to date vehicle application listings refer to the Tridon website www.tridon.com.au (or www. tridon.co.nz) and go to Tridon Part Finder.
Pressure Rating Always replace the cap with the same pressure rating as recommended by the vehicle manufacturer. Each additional pound of pressure above the specified pressure increases the boiling point of the coolant by 1.4°C or 2.5°F. Generally caps are designed from 4PSI (30kPa) to 30PSI (205kPa).
Pressure Conversion PSI
kPa
4
30
7
50
10
70
13
90
14
95
15
100
16
110
17
120
18
125/130
19
130
20
135/140
21
145
22
150
30
200/205
93
Function In the normal position both the pressure and vacuum valves of the Tridon cap remain closed (Figure 1). The pressure in the cooling system rises as the temperature rises. When the pressure begins to exceed the caps rated pressure, the pressure valve opens (Figure 2) releasing pressurised coolant from the radiator into the recovery or expansion tank. The pressure valve closes as the excess cooling system pressure reduces. The cycle of opening and closing the pressure valve continues, maintaining the appropriate system pressure and protecting cooling system components from over pressurisation. As the system cools down cooling system pressure reduces, creating negative cooling system pressure. Negative pressure can cause radiator tanks and hoses to collapse leading to damage to the cooling system. To prevent damage, Tridon radiator caps have an additional vacuum valve to allow coolant or air to return to the radiator as the pressure reduces (Figure 3). This serves a dual purpose of allowing the cooling system pressure to equalise as well as allowing coolant to return to the radiator.
Recovery Radiator Cap Figure 1 – Radiator cap in closed position. Top Shell Spring Disk Upper Sealing Gasket
Filler Neck Vacuum Spring
Vacuum Valve
Lower Sealing Gasket
Figure 2 – Pressure has exceeded the rated pressure releasing pressurised coolant from the radiator. Upper Sealing Gasket Pressure Spring
Figure 3 – As pressure reduces, the radiator cap additional vacuum valve allows coolant or air to return to the radiator. Upper Sealing Gasket
Vacuum Spring
Vacuum Valve
Lower Sealing Gasket
Radiator Cap Test Procedure For correct radiator cap testing a commercial type radiator cap and coolant system tester is required. For details on cooling system and radiator cap testers see service tools section page 117, including Toledo and Sykes Pickavant cooling systems and cap pressure testers.
Note: There is a tolerance of 1-2PSI either side of the nominated pressure rating. Retest cap to verify results. The cap should be replaced if: 1. The pressure is exceeded and it does not fall back to the nominated pressure tolerance of 1-2PSI.
Step 1 Select the hand pump gauge assembly. Step 2 Select cap adaptor if required and attach to pump. Step 3 Moisten seals and connect cap to adaptor or pump. Step 4 Pump to exceed cap nominated pressure by 30%. Cap should blow off and return to nominated pressure. Step 5 Pressure should hold at the nominated pressure. 94
2. The cap does not hold any pressure, i.e. needle on pump immediately returns to zero. 3. The cap falls outside the 1-2 PSI tolerance in holding pressure.
Identification Guide CA Series
CA Series with Safety Lever
Type Recovery cap Style Standard bayonet
Type Recovery cap Style Standard bayonet
Radiator Cap
CA, CN Series
59.0mm
29.0mm
Pressure PSI kPa 7 50 13 90 14 95 15 100 16 110 18 125 20 135 22 150
CA Series Lever
Part No. CA0750 CA1390 CA1495 CA15100 CA16110 CA18125 CA20135 CA22150
59.0mm
Pressure PSI kPa 7 50 13 90 15 100 16 110 20 135
CA0750L CA1390L CA15100L CA16110L CA20135L
Pressure PSI kPa 13 90 16 110
CB1390L CB16110L
Radiator Caps
Radiator Cap
Part No.
29.0mm
38.5mm
38.5mm
CB Series
CB Series with Safety Lever
Type Recovery cap Style Cap Small Japanese bayonet Radiator CB Series
46.0mm
Type Recovery cap Style Small Japanese Radiator Cap CB Seriesbayonet Lever
Pressure PSI kPa 13 90 15 100 16 110 17 120 18 125
Part No. CB1390 CB15100 CB16110 CB17120 CB18125
46.0mm
24.0mm
Part No.
24.0mm
28.0mm
28.0mm
CC Series
CD Series
CE Series
Type Recovery capCC Series Radiator Cap Style Extra small Japanese bayonet
Type Recovery capCD Series Radiator Cap Style Plastic screw (suits M48)
Type Recovery capCE Series Radiator Cap Style Plastic screw (suits M52)
44.0mm
58.0mm
21.0mm
Pressure PSI kPa 13 90 16 110
29.0mm
33.5mm 45.0mm
26.0mm
Part No. CC1390 CC16110
61.0mm
Pressure PSI kPa 20 135
23.0mm
49.5mm
Part No. CD20135
Note: To ensure correct product selection check vehicle application list.
Pressure PSI kPa 18 125
Part No. CE18125
95
Identification Guide CF Series
CG Series
CH Series
Type Recovery cap Radiator Cap CF Series Style Plastic screw (suits M45)
Type Recovery cap Radiator Cap CG Series Style Plastic screw (suits M45)
Type Recovery cap Radiator Cap CH Series Style Plastic screw (suits M52)
75.0mm
75.5mm
18.5mm
18.0mm
28.5mm
35.0mm 49.5mm
43.5mm
43.5mm
Pressure PSI kPa 10 70 14 95 20 135
60.5mm
Part No. CF1070 CF1495 CF20135
Pressure PSI kPa 14 95
Part No. CG1495
Pressure PSI kPa 16 110
Part No. CH16110
CJ Series
CK Series
CL Series
Type Recovery capCJ Series Radiator Cap Style Plastic screw (suits M45)
Type Recovery capCK Series Radiator Cap Style Plastic screw (suits M58)
Type Recovery capCL Series Radiator Cap Style Plastic screw (suits M53)
52.0mm
79.0mm
27.0mm
36.0mm
68.0mm
45.5mm
43.0mm
Pressure PSI kPa 16 110 18 125 20 140
Part No. CJ16110 CJ18125 CJ20140
Pressure PSI kPa 18 125
Part No. CK18125
CM Series
CN Series
Type Recovery capCM Series Radiator Cap Style Plastic screw (suits M52)
Type Non recovery cap Radiator Cap CN Series Style Standard bayonet
84.0mm
59.0mm
33.0mm
31.0mm
49.5mm
Pressure PSI kPa 16 110
96
29.0mm 49.5mm
57.5mm
38.0mm
Part No. CM16110
Note: To ensure correct product selection check vehicle application list.
Pressure PSI kPa 20 135 30 205
CL20135 CL30205
Pressure PSI kPa 4 30 7 50 10 70 13 90 15 100 20 135
CN0430 CN0750 CN1070 CN1390 CN15100 CN20135
Part No.
Part No.
CP Series
CR Series
Type Recovery capCO Series Radiator Cap Style 4 ear bayonet
Type Non recoveryCP cap Radiator Cap Series Style Large bayonet
Radiator Cap Type Non recovery CR capSeries Style Standard bayonet
59.0mm
60.0mm
81.0mm
34.5mm
29.0mm
27.5mm
38.0mm
Pressure PSI kPa 18 125
38.5mm
52.0mm
Part No. CO18125
Pressure PSI kPa 4 30 7 50 10 70
Part No. CP0430 CP0750 CP1070
Pressure PSI kPa 4 30 7 50 10 70 13 90
Part No. CR0430 CR0750 CR1070 CR1390
CS Series
CT Series
CU Series
Type Recovery capCS Series Radiator Cap Style Plastic screw (suits M48)
Type Recovery capCT Series Radiator Cap Style Plastic screw (suits M63)
Type Recovery capCU Series Radiator Cap Style Plastic screw (suits M53)
81.0mm
58.0mm
63.0mm
32.5mm
21.0mm
39.5mm 45.5mm
Pressure PSI kPa 16 110
50.0mm
63.0mm
Part No. CS16110
Pressure PSI kPa 22 150
Part No. CT22150
Pressure PSI kPa 17 120 20 135
Part No. CU17120 CU20135
CV Series
CW Series
CX Series
Type Recovery capCV Series Radiator Cap Style Plastic screw (suits M45)
Radiator Cap Type Recovery capCW Series Style Plastic screw (suits M55)
Type Recovery capCX Series Radiator Cap Style Plastic screw (suits M53)
49.5mm
28.5mm 18.5mm 34.0mm
Pressure PSI kPa 16 110 19 130
64.0mm
65.0mm
39.5mm
38.0mm
39.0mm 53.0mm
Part No. CV16110 CV19130
Radiator Caps
CO Series
Pressure PSI kPa 16 110 18 125
29.5mm 49.5mm
Part No. CW16110 CW18125
Note: To ensure correct product selection check vehicle application list.
Pressure PSI kPa 18 125
Part No. CX18125
97
Identification Guide CY Series
CZ Series
DA Series
Type Recovery capCY Series Radiator Cap Style Plastic screw (suits M52)
Type Recovery cap Radiator Cap CZ Series Style Plastic screw (suits M53)
Type Recovery capDA Series Radiator Cap Style Plastic screw (suits M50)
72.0mm
65.0mm
63.0mm
22.0mm
36.0mm
35.5mm
Pressure PSI kPa 18 125
Part No. CY18125
Pressure PSI kPa 20 140
Part No. CZ20140
Pressure PSI kPa 21 145
Part No. DA21145
DB Series
DC Series
DD Series
Type Recovery capSeries Radiator Cap DB Style Plastic screw (suits M62)
Type Recovery capDC Series Radiator Cap Style Plastic (suits M45)
Type Recovery capDD Series Radiator Cap Style Plastic screw (suits M53)
70.0mm
60.0mm
61.0mm
35.0mm
30.5mm
37.0mm
40.5mm 59.5mm
Pressure PSI kPa 20 140
30.0mm 49.5mm
42.5mm
Part No. DB20140
Pressure PSI kPa 20 140
Part No. DC20140
Pressure PSI kPa 17 120
Part No. DD17120
DE Series
DF Series
DG Series
Type Recovery cap Radiator Cap DE Series Style Plastic bayonet
Type Recovery cap Radiator Cap DF Series Style Plastic screw (suits M53)
Type Recovery cap Radiator Cap DG Series Style Plastic screw (suits M38)
87.0mm
63.0mm
29.0mm 49.0mm
41.0mm
Pressure PSI kPa 20 140
Part No. DE20140
54.0mm
46.0mm
33.0mm
98
29.5mm 48.0mm
29.5mm 49.5mm
50.5mm
Pressure PSI kPa 20 140 30 200
34.0mm
36.0mm
Part No. DF20140 DF30200
Note: To ensure correct product selection check vehicle application list.
Pressure PSI kPa 20 140
Part No. DG20140
DJ Series
Type Recovery cap DH Series Radiator Cap Style Plastic screw (suits M62)
Type Recovery cap DJ Series Radiator Cap Style Plastic screw (suits M44)
87.0mm
60.5mm
30.0mm
28.0mm
63.0mm
Pressure PSI kPa 18 130
Radiator Caps
DH Series
42.0mm
Pressure PSI kPa 18 130
Part No. DH18130
Part No. DJ18130
TRC Series – Small
TRC Series – Standard
TRC Series – Large
Type Blanking cap Style Small metal bayonet
Type Blanking cap Style Standard metal bayonet Radiator Cap TRC Series - Standard TRC10
Type Blanking cap Style Large metal bayonet
Radiator Cap
TRC Series - Small TRC11
Radiator Cap
59.0mm
46.0mm
73.0mm
9.0mm
8.0mm
Pressure PSI kPa Nil Nil
Part No. TRC11
TRC Series
9.0mm
Pressure PSI kPa Nil Nil
Part No. TRC10
Note: To ensure correct product selection check vehicle application list.
Pressure PSI kPa Nil Nil
Part No. TRC32
99