Radiator; Radiator Cap - Kubota D650-B Handbuch

__
[AJ Type of radiator core
(2)
(31 -
--'"
0076F014
(11
C042F050
3-3 RADIATOR (not included in the basic
,"""in,:.'
Radiator core consists of water carrying tubes and fins
making a right angle with the tubes. Heat of hot water in the
tubes is radiated from the tube walls and fins. KUBOTA's
engine uses corrugated fin type core which has a light weight
and high heat transfer rate. Clogging is minimized by the
louverless fins.
Specifications for radiator
I
Type o_f_co_r_e- - - - - - : - c-_ ---""t-
I
_Lo_u-c"-ce-crl_es_s_c--:0--crr_u::-ga_t_ed--:--:fi_n---i
Width 382mm (15.04 in,)
Dimensions of core Height 300mm (11.81 in.)
Radiation area _ _ _ _ _ T_h_iC_k_"'" 1"_""
1~4~63:00"~_k:ca~12/c6hu~~~et)
" " " ==r
LF\adiating capacity
III
Fin
(2)
Tube
(3) Cooling air
(4) Louverless corrugated fin
(5) Louvered corrugated fin
Radiator cap (upper specified pressure)
When pressure in the radiator exceeds the specified
OOllF033
IS] Radiator cap (lower specified pressure)
When pressure in the radiator falls below the SPElcified
pressure
RADIATOR CAP (not included in the basic
engine)
The radiator cap is a pressure type, which opens the pressure
valve to reduce internal pressure when internal pressure is
increased beyond a certain point due to increase in water
temperature. The normal valve actuating pressure of the
radiator cap is 88kPa (O.9kgf/cm
2
,
13 psi).
When water temperature is reduced (and its volume is
reduced) pressure in the radiator becomes negative, and the
vacuum valve opens and introduces air into the radiator to
prevent distortion of the radiator.
(1 I Pressure \/al\/e
121 Vacuum valve
62