34. ADJUSMENT OF V-BELT
(Impeiier pump):
~ ~ ~ In the case of engines fitted with impeller
Q ' \ "\.:=~ ~' ~ ~ pump and alternator, V-belt (3) tension-
~~ --:. / = ing is carried out as described foT engines
'" '_~? I - with, altenators (.see Fig 47), but with the
. '" 1 tensIon tested mldway between pump and
~ alternator.
~' ~ For engines fitted only with an impeller
: ~.,; //
~ 2 pump, the V-belt (4) is tensioning by slack-
~ ..). ~(/~ ~ ing oft t~e securing and tensioning balts (~)
~ 1)
) 3 aD? movmg.the pump <?utwar?s. !De tensl-
""'cc.
(~~~;;~~~~::~;~~ ~ omng screw IS shown as Item 5 m FIg 36.
, ()
'".: ,Re-tighten balts securely.
l
Fig. 49
, 35. ADJUSTMENT OF ENGINE IDLING
:
t j
\ ~ ~ Idling speed may be adjustet externally by
i ~~"""!;f';::= means of the set screw on the TeaT of the
I
h1'~ ~ --- governor cover.
3 '\ ~
~ 1.R~movethedomenut(1).
U \\-'---:-- \ 2. Insert key (2) into hexegonal socket of idle
% -'~ setscrew(3).
--' ~ 3. Adjust idling speed by turning set screw.
' --,' \ '@ ---::::::::: Screwing set screw (3) out ~111 tighten
~. ,; ! I, 0 ;; spring and increase engine idling speed.
J J ~ Minimum idling speed should be set at
I
~Jl about 350-400 rpm and it should remain
~ ) constant foT 100 -150 movement of the
.. ~ -..p(/ governor controllever.
: 4. Setting "extent" of idling range (not
".~, Fig. 50 usually necessary to adjust).
Unscrew plug (4) using 5/16 Allen key. Insert screwdriver in opening and engage
with governor arm adjusting screw. Screwing in the adjusting screw will"ipcrease
'" the idling range givenby the governor but it win at the same time reduce the
maximum engine speed available.
...
38 :j,.
~'
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.'
,
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~ :~;; ".., .
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